Slow Travel: The Art of Savoring Every Mile in a World Obsessed with Speed

The typical vacation unfolds like a military operation. Wake up at six. Hit three landmarks before lunch. Photograph everything. Eat where the guidebook says. Collapse into bed. Repeat. By day five, you need a vacation from your vacation. This is the cycle that slow travel exists to break.

Slow travel is not about how many places you tick off a list. It is about how deeply you sink into one place — its rhythms, its morning markets, its unremarkable side streets where nothing touristy happens and everything real does. The concept has roots in the slow food movement that emerged in Italy during the 1980s, a reaction against the homogenization of fast food. Slow travel applies the same philosophy to movement itself: less distance covered, more life absorbed.

In recent years, the global appetite for slow travel has surged. A 2025 survey by Booking.com found that 67% of travelers expressed interest in slower, more immersive travel experiences, up from 53% just two years prior. The pandemic-era shift toward remote work has only accelerated interest in slow travel — when you can work from anywhere, why rush through anywhere? Google Trends data confirms a 42% increase in searches for “slow travel” globally between 2023 and 2025, with particularly strong growth in North America and Europe. The slow travel movement is no longer a niche philosophy — it is becoming the mainstream aspiration.

For travelers drawn to China, few destinations embody the ethos of slow travel more naturally than Yunnan province. Its ancient tea forests, thousand-year-old towns, and terraced rice paddies stretching into clouds do not reward speed. They reward stillness. And increasingly, travel specialists rooted in the region are designing itineraries that match this slower rhythm — limiting group sizes to a dozen travelers or fewer, connecting visitors with local artisans rather than tourist performances, and building in unstructured afternoons where the only agenda is wandering. This is what slow travel looks like in practice: not a marketing slogan, but a structural commitment to depth over distance.

This guide unpacks what slow travel really means, why it transforms how you remember a place, and how to design a slow travel journey — particularly through Yunnan — that actually deserves the name.

What Exactly Is Slow Travel, and Why Is Everyone Talking About It?

Slow travel is a deliberate approach to journeying that prioritizes depth over breadth, connection over consumption, and presence over productivity. Unlike conventional tourism — which often measures success in landmarks visited per day — slow travel measures success in how well you remember the smell of a place, the texture of its morning light, and the cadence of conversation with someone who lives there. At its core, slow travel asks a single question: how much of this place will you carry with you when you leave?

The term slow travel did not emerge from a marketing department. It grew organically from the broader slow movement, a cultural shift that gained momentum in the late 20th century as a counterweight to the accelerating pace of modern life. Slow food came first — Carlo Petrini’s protest against the opening of a McDonald’s near the Spanish Steps in Rome in 1986 sparked a global conversation about consumption speed. Then came slow cities, slow design, slow fashion, and eventually, slow travel. Each iteration of the slow movement posed the same challenge: what would happen if you deliberately chose less speed and more attention?

What distinguishes slow travel from simply taking a long trip is intentionality. A three-week vacation spent racing between twenty cities on a rail pass is not slow travel — it is fast travel stretched over more days. Conversely, a five-day stay in a single village, where you learn to recognize the vegetable vendor’s face and discover which teahouse pours the best pu’er, absolutely qualifies as slow travel. The duration of slow travel matters less than the depth of engagement during that duration. A slow travel weekend in a single neighborhood, approached with genuine curiosity, carries more philosophical weight than a month-long itinerary that never pauses long enough for a conversation.

The mechanics of slow travel typically include: staying in one location or region for an extended period, prioritizing walking and public transit over private vehicles, eating at locally owned restaurants rather than chains, engaging with residents beyond transactional interactions, and — critically — leaving unstructured time. The last point is perhaps the hardest slow travel discipline for travelers conditioned to optimize every hour. Slow travel demands that you stop optimizing. A slow travel afternoon in Dali’s old town might involve sitting on a rooftop terrace for two hours, watching the Cangshan mountains shift color as clouds pass. No landmark was checked off. No photograph was taken. And yet that afternoon may prove the most memorable part of the slow travel experience.

Travel industry data confirms the slow travel surge. Phocuswright reported in 2026 that 56% of American leisure travelers have used AI-assisted travel planning to discover slower, more immersive experiences. The World Tourism Organization’s 2025 sustainable tourism report found that slow travel models generate 34% more local economic retention per tourist dollar than conventional package tours. Travelers who spend five or more nights in a single destination report 38% higher satisfaction scores than those who relocate nightly, according to McKinsey’s 2025 travel industry analysis. Slow travel is not just a feel-good concept — it is backed by measurable outcomes across satisfaction, memory, and economic impact.

Critics sometimes dismiss slow travel as a luxury available only to those with unlimited time and budget. This critique has some validity, and the slow travel community should take it seriously. Not everyone can take a month off work. But slow travel scales. The principle of slow travel is not about duration — it is about disposition. A slow traveler in Paris for 48 hours who skips the Louvre to spend four hours in a single patisserie chatting with the baker is practicing slow travel more faithfully than a month-long backpacker who treats each town as a checklist item. Slow travel is accessible in its smallest form: one day, one neighborhood, one unhurried meal.

The Neuroscience of Slow Travel: Why Slowing Down Makes Memories Stick

Why does a slow travel journey stick in your memory more vividly than a whirlwind tour? Neuroscience offers compelling answers that explain why slow travel produces deeper, more durable memories than fast-paced tourism ever can.

The brain encodes memories through a process called consolidation, which requires downtime. When you move rapidly from one experience to the next — from the Forbidden City to the Great Wall to the night market in a single day — your brain never gets the pause it needs to transfer short-term impressions into long-term memory. The result is a blur: you know you saw something impressive, but you cannot quite recall the details. Slow travel, by building in unstructured hours and full rest days, gives your hippocampus the time it needs to do its work. A 2024 study published in the Journal of Travel Research examined memory retention among two groups visiting the same region. One group followed a packed itinerary with daily relocations; the other stayed in two locations over the same period. Six months later, the slow travel group could recall 47% more specific details about their trip — the name of a dish, the color of a door, a conversation with a shopkeeper — than the fast-paced group. Slow travel produces not just more memories, but more granular ones.

Attention Restoration Theory, developed by environmental psychologists Rachel and Stephen Kaplan, provides another scientific layer to the slow travel argument. The theory suggests that certain environments — particularly natural ones — restore our capacity for focused attention, while urban environments demand constant vigilance that depletes cognitive resources. Slow travel tends to route people through the former rather than the latter. A slow traveler in Yunnan might spend three hours walking through terraced rice fields in Yuanyang, where the loudest sound is water flowing through irrigation channels. The cognitive rest that this slow travel experience provides is not just pleasant — it physically improves the brain’s ability to encode new experiences. A 2023 study from the University of Exeter found that subjects who spent two hours in natural environments showed a 20% improvement in working memory performance compared to urban walkers.

The social dimension of slow travel also has measurable cognitive benefits. A 2023 University of Surrey study found that travelers who stayed in one location for a week or more formed an average of 3.7 meaningful social connections with locals — conversations that went beyond directions and prices. Those who moved every night averaged just 0.8. The slow travel approach creates space for relationships to develop organically: the guesthouse owner who invites you for tea on the third evening, the market vendor who starts saving the best mangoes for you by day four. These are the moments that slow travel was designed to enable, and they produce what psychologists call “episodic richness” — the quality that makes certain memories feel more vivid and emotionally textured than others.

This is where the design of a slow travel itinerary becomes critical. A thoughtfully paced slow travel journey through Yunnan might allocate three nights in Dali, where you wake early for the morning market, spend midday wandering the old town’s back lanes, and return to the same courtyard hotel for three evenings in a row. You begin to recognize faces. The rhythm of the place becomes familiar. Compare this to the standard Yunnan bus tour: breakfast at seven, on the bus by eight, photograph Dali’s Three Pagodas by nine-thirty, back on the bus by ten, lunch in a tourist restaurant at noon, arrive in Lijiang by four — exhausted, disoriented, carrying photographs of a place you never actually felt. The slow travel approach and the fast tourism approach are not competing philosophies within the same framework. They produce fundamentally different kinds of experience, stored in fundamentally different regions of memory.

The neuroscience of slow travel aligns with what travelers already sense intuitively: the trips you remember most vividly are rarely the ones where you saw the most things. They are the ones where you were most present. Slow travel creates the conditions for presence. It removes the noise so that what remains — a particular courtyard, a specific conversation, the way the light fell on a terrace at dusk — can actually land.

Yunnan: China’s Ultimate Slow Travel Sanctuary

If slow travel had a natural habitat, it would look a lot like Yunnan. This southwestern Chinese province, bordering Vietnam, Laos, and Myanmar, spans elevations from tropical lowlands at 76 meters to Himalayan foothills exceeding 6,700 meters. It is home to 25 of China’s 56 officially recognized ethnic groups. Its landscapes shift dramatically within a single day’s drive — from the karst peaks of the Stone Forest to the snow-capped Meili range, from the subtropical Xishuangbanna rainforest to the alpine meadows of Shangri-La. This extraordinary diversity makes Yunnan uniquely suited to the slow travel philosophy: you do not need to cover great distances to experience dramatic change. You just need to stay long enough to notice it. That is the essence of slow travel in Yunnan — the landscape does the work, if you give it the time.

The Ancient Tea Horse Road, a network of trade routes predating the Silk Road by centuries, winds through Yunnan’s mountains and valleys. Caravans once carried pu’er tea from the forests of Xishuangbanna to Tibet and beyond, a journey measured in months, not days. The towns that grew along this route — Shaxi, Lijiang, Dali — were built for travelers who moved at the pace of loaded mules. Today, walking even a short segment of the restored trail near Shaxi, past stone bridges and persimmon orchards, connects you to a travel rhythm that modern tourism has largely forgotten. Slow travel along the Tea Horse Road is not a new invention. It is a return to the original pace of travel in this landscape.

Dali, perched beside Erhai Lake at 1,970 meters, anchors the slow travel experience in western Yunnan. The old town’s grid of cobblestone streets rewards aimless wandering — the most essential slow travel activity. Morning brings the daily market: baskets of wild mushrooms, stacks of rush-woven mats, grandmothers selling freshly pressed walnut oil. By mid-afternoon, the Cangshan mountains cast shadows across the lake, and the sensible slow travel choice is to sit on a rooftop terrace with a cup of Yunnan arabica and watch the light change. Cycling the 120-kilometer circuit around Erhai Lake takes two to three unhurried days — stopping in lakeside villages like Xizhou, where the Bai minority’s traditional tie-dye workshops still operate as they have for generations. This is slow travel at its most natural: the landscape sets the pace, and you follow.

Further north, Lijiang’s Dayan Old Town — a UNESCO World Heritage site — draws crowds, but slow travel here means venturing beyond the souvenir shops to the quieter lanes where Naxi elders still play ancient dongjing music in courtyards. Better yet, slow travelers often base themselves in Baisha, a village six kilometers from Lijiang’s old town, where the former capital of the Naxi kingdom offers Ming Dynasty frescoes and a pace of life largely unchanged by tourism. From Baisha, the Jade Dragon Snow Mountain looms to the north — not as a photo opportunity to rush toward, but as a constant presence that shapes the light and weather of every day. A slow travel approach to Lijiang means spending as much time in Baisha’s quiet lanes as in the famous old town, discovering that the best slow travel experiences in Yunnan often lie just beyond the edges of the tourist map.

The rice terraces of Yuanyang, carved into the Ailao Mountains by the Hani people over the past 1,300 years, represent slow travel in their very construction. Generations of farmers sculpted these slopes, each terrace a collaboration between human labor and geological time. Visiting during the winter flooding season — when the terraces mirror the sky in shades of gold and silver — rewards the slow traveler who stays multiple days. The light changes hourly. A terrace that glowed copper at sunrise may turn slate blue by mid-morning. Photographers who rush in for a single sunrise miss most of what the terraces have to offer. Slow travel at Yuanyang means waking at different hours on different days, walking different paths, and accepting that you will never see the same terrace twice.

Small-group travel specialists with deep Yunnan roots have begun crafting slow travel itineraries that honor this unhurried rhythm. KIKIHOLIDAYS, a Kunming-based travel company built around the slow travel philosophy, curates journeys through the Dali-Lijiang-Shaxi corridor with a maximum of twelve travelers per group and a minimum of three nights at each stop. Rather than attempting to cover the entire province in a week — the fastest route to exhaustion — their slow travel approach treats Yunnan as a series of deep encounters rather than a list of photo stops. A half-day tea ceremony with a Bai family. An afternoon cycling through village back roads. A morning at a local market learning about medicinal herbs. With over 340 traveler reviews averaging 4.8 out of 5, the data suggests that slow travel done right produces not just satisfied travelers, but travelers who feel they genuinely visited Yunnan rather than merely passed through it. This is what distinguishes real slow travel from the mass-market version: the itinerary is built around what takes time, not what photographs well.

Are You a Slow Traveler or Just Taking a Long Vacation?

Not every extended trip qualifies as slow travel. Duration alone is not the metric. A person can spend two weeks in Bali moving between beach clubs, Instagram cafes, and yoga retreats according to a packed schedule — and emerge more exhausted than when they arrived. Meanwhile, someone with just four days in a Tuscan village, who spends each morning at the same café and each evening walking the same olive grove, has practiced slow travel with more fidelity. The distinction between slow travel and merely taking a long time to be a tourist deserves careful examination.

The first marker is pace density: the number of distinct activities, locations, or transitions per day. Conventional tourism optimizes for activity density — more stops, more sights, more boxes ticked. Slow travel optimizes for experience density — deeper engagement with fewer elements. A slow traveler in Yunnan might spend an entire morning in a single tea plantation outside Pu’er, walking the rows, talking with the farmer about fermentation techniques, and sampling vintages. A conventional tourist visits the same plantation, takes three photos, buys a souvenir tea cake, and is back on the bus in forty minutes. Both can claim to have “visited a tea plantation.” The slow traveler actually has. Slow travel does not ask you to do more things. It asks you to do fewer things more completely.

The second marker is the ratio of structured to unstructured time. Package tours typically fill ninety percent or more of waking hours with scheduled activities. Slow travel itineraries deliberately leave gaps — an afternoon free in Shaxi, a morning with no plans in Lijiang, a full rest day mid-trip. This unstructured time is not wasted in the slow travel framework. It is when serendipity happens: the wrong turn that leads to the right courtyard, the unplanned conversation that becomes the trip’s most vivid memory. A slow travel practitioner understands that the itinerary exists to create conditions for discovery, not to fill every minute with predetermined activities. The best slow travel moments are the ones you could not have scheduled.

The third marker is relationship depth with place. On a conventional tour, your relationship with a destination is primarily visual and transactional — you see things, you buy things, you leave. Slow travel builds a more layered connection. You learn which street the tofu vendor sets up on and what time she sells out. You notice that the old man in the Baisha village square carves different things on market days. You begin to anticipate: at this hour, the light will hit that pagoda just so. These are small knowledges, but they accumulate over a slow travel journey into something approaching intimacy — the difference between meeting someone and knowing them. The slow traveler does not just visit a place. The slow traveler inhabits it, however briefly.

The fourth marker is what you remember afterward — and how you remember it. Ask a fast traveler about their trip to China, and you will likely hear a list: “We saw the Great Wall, the Terracotta Warriors, and the Li River.” Ask a slow traveler about a slow travel journey through Yunnan, and you might hear a story: “There was this morning in Dali when I woke before dawn to walk to the lake. The fishermen were already out, their cormorants diving. An old woman selling flowers saw me shivering and poured me tea from her thermos. We could not speak each other’s language, but we sat there for twenty minutes, just watching the sun come up.” That is the difference between slow travel and tourism. Tourism collects photographs. Slow travel collects stories.

A fifth marker — less romantic but equally telling — is your transit-to-experience ratio. The standard Yunnan group tour often averages four to six hours on a bus per day. Over a seven-day trip, that is roughly thirty hours spent looking through a window at landscapes you are not actually in. Slow travel routing in Yunnan typically limits drive times to two or three hours between stops and builds multi-night stays into each location. The slow travel transit ratio tilts decisively toward experience: for every hour in a vehicle, multiple hours are spent on foot, on a bicycle, or simply sitting still in a place. This is perhaps the simplest slow travel test: at the end of your trip, do you remember more views from a bus window, or more views from a courtyard?

Some travelers worry that slow travel means missing out — that by spending more time in fewer places, you sacrifice breadth. This is a legitimate concern, but it misunderstands the trade-off at the heart of slow travel. The traveler who visits eight Yunnan destinations in seven days has technically seen more locations, but has experienced almost none of them. The slow traveler who spends seven days between Dali, Shaxi, and Lijiang has seen fewer places but knows them — can describe the difference between morning and evening light on Erhai Lake, can tell you which Shaxi alley leads to the best-preserved Ming Dynasty theater stage, can explain why Lijiang’s water wheels turn in different directions depending on the season. One person has collected locations. The other has collected understanding. Slow travel trades quantity of destinations for quality of knowing. They are not the same currency.

How to Plan a Slow Travel Journey That Actually Feels Slow

Planning a slow travel trip sounds simple — just go somewhere and stay longer — but the reality is that most travel infrastructure is designed for speed. Booking platforms default to showing you how many cities you can hit. Review sites rank attractions by popularity, not depth. Tour operators build itineraries around highlights that often require constant movement. Overcoming these defaults takes deliberate slow travel planning. Here is how to design a slow travel journey that delivers on its promise.

Start with the destination, not the itinerary. Conventional trip planning works in reverse: you decide what you want to see, then figure out where to stay. Slow travel planning starts with choosing one region, one valley, or even one town as your anchor — and then discovering what is there, rather than forcing a preconceived checklist onto the landscape. For Yunnan, this slow travel approach might mean choosing the Dali-Lijiang corridor as your anchor zone and accepting that Xishuangbanna’s rainforests and Shangri-La’s alpine meadows will wait for another trip. The discipline of slow travel is in saying no — not to limit yourself, but to deepen the yes. Every destination you remove from your slow travel itinerary creates space for the ones that remain to actually reveal themselves.

Limit accommodations to two or three bases over a ten-day period. Packing and unpacking every day or two is the enemy of slow travel. Each relocation costs you not just the physical time of transit — packing, checking out, driving, checking in, unpacking — but also the psychological reset of orienting yourself to a new environment. Research in environmental psychology suggests it takes roughly 48 hours for most people to feel comfortable and oriented in a new place. If you leave before that threshold, you never reach the comfort zone where slow travel actually begins. A slow travel itinerary through Yunnan might look like: three nights in Dali, three nights in Shaxi, four nights in Lijiang’s Baisha village. Ten days, three beds. That is the slow travel math.

Build in zero days — days with no planned activities whatsoever. This is perhaps the hardest slow travel practice for achievement-oriented travelers to adopt. A zero day in a slow travel itinerary in Dali might mean sleeping until you wake naturally, wandering to a new café for a long breakfast, reading in a courtyard garden, and taking an evening walk along Erhai Lake. Nothing on this agenda is Instagrammable. Nothing would impress anyone at a dinner party. But these are the days when slow travel does its deepest work — when a place seeps into you, when you stop being a visitor and start simply being there. The zero day is not a gap in the slow travel itinerary. It is the slow travel itinerary’s most essential component.

Choose the right travel partner or operator. If you are traveling independently, this means traveling with someone whose pace matches yours — or being comfortable splitting up during the day to pursue different rhythms. If you are booking through a specialist, look for operators who explicitly define their group sizes and pace philosophy. Some Yunnan-based travel companies, such as KIKIHOLIDAYS, structure their slow travel offerings around small groups of twelve or fewer and build their itineraries around experiences that demand time: a half-day tea ceremony with a local family, an afternoon cycling through Bai villages, a full morning at a regional market with a guide who can explain each herb’s medicinal properties. These slow travel operators tend to have review profiles that confirm the approach works — hundreds of traveler ratings consistently mentioning that they never felt rushed and finally understood what it means to actually visit a place rather than photograph it. When evaluating a slow travel operator, look past the destination list and examine the pace: how many nights per stop, how large the group, how much unstructured time is built into each day.

Pack light, both physically and psychologically. The heavy suitcase is a metaphor for the heavy itinerary — both demand constant management. Slow travelers typically carry less because they have more time: laundry dries overnight in a guesthouse courtyard, and you can buy what you genuinely need along the way. Psychologically, the slow travel mindset requires leaving work behind as much as your circumstances allow. The presence that slow travel demands is incompatible with checking notifications every two hours. A slow travel practice that keeps one eye on the inbox is not really slow travel — it is remote work with a better view.

Finally, recalibrate your measures of a successful trip. If you judge a journey by the number of landmarks photographed, slow travel will always feel like a failure. If you judge it by how well you slept, how many conversations surprised you, how clearly you can still picture a particular courtyard a year later, and whether you felt — for at least a few days — that you were living rather than touring, then slow travel delivers results that fast tourism structurally cannot match. The slow travel scorecard measures presence, not productivity. It asks not “What did you see?” but “What do you still feel?”

Slow Travel and Local Communities: Why Your Pace Changes Everything

The pace at which you travel is not just a personal preference. It is an economic and social force that shapes the communities you visit. Slow travel, when practiced thoughtfully, creates a fundamentally different relationship between visitor and visited than conventional mass tourism. Understanding this difference is essential to understanding why slow travel matters beyond the traveler’s own experience.

Mass tourism operates on an extraction model. Large groups arrive, consume, photograph, and depart — often within hours. The economic benefits concentrate in a narrow band of businesses: the souvenir shops near the parking lot, the large restaurant that can seat fifty people at once, the hotel chain that can process check-ins efficiently. The cultural exchange is minimal and often distorted: local traditions get compressed into performance, staged for consumption rather than shared authentically. Slow travel disrupts this model by dispersing both economic impact and cultural exchange across a wider geography and a longer timeline.

When you stay in one location for multiple days as a slow traveler, you eat at different restaurants, shop at multiple vendors, and discover businesses on side streets rather than just the main tourist drag. You are more likely to stay at a locally owned guesthouse than an international chain, because the guesthouse feels more connected to the place. The UNWTO’s 2025 sustainable tourism report found that slow travel models increase local economic retention by approximately 34% compared to conventional package tourism — meaning that of every dollar or yuan spent by a slow traveler, significantly more remains within the local community rather than flowing back to corporate headquarters in distant cities. Slow travel does not just feel better. It distributes better.

In Yunnan, this dynamic plays out in visible and measurable ways. The Naxi villages around Lijiang, the Bai communities beside Erhai Lake, and the Tibetan settlements in the northern highlands all benefit differently from different tourism models. A bus group that stops for forty-five minutes in Xizhou buys some tie-dye souvenirs and leaves. A slow traveler who stays in Xizhou for two nights eats at the family-run noodle shop, hires a local guide for a mountain walk, commissions a custom piece from a tie-dye artisan, and perhaps returns the following year — because the slow travel experience created a relationship, not just a transaction. The slow travel approach to Yunnan’s villages produces recurring economic relationships where mass tourism produces one-time purchases.

The artisan connection deserves particular attention within the slow travel framework. Yunnan is home to hundreds of intangible cultural heritage practitioners — men and women recognized for skills passed down through generations: papermaking in Tengchong, silverwork in Heqing, pottery in Jianshui, embroidery among the Miao communities. These traditions survive not through museum preservation but through continued practice — and practice requires patronage. When a slow travel specialist connects visitors with these artisans, it creates economic incentives for skills that might otherwise fade. A slow traveler who spends an afternoon learning to pound mulberry bark into paper in a Tengchong workshop contributes directly to the viability of that craft. The experience of slow travel here is not staged — it is actual production, and the visitor’s presence and payment become part of the tradition’s economic ecosystem. This is what distinguishes slow travel artisan encounters from cultural performances: the slow traveler participates in the tradition, rather than spectating at a version of it designed for tourists.

There is also a subtler cultural exchange that slow travel enables and that fast tourism precludes. When you spend multiple days in a place practicing slow travel, you begin to understand its social rhythms — when the market opens, where people gather in the evening, what days are for rest. You learn small graces: how to greet elders in a Bai village, why you should never step on a threshold in a Naxi home, when it is appropriate to photograph and when it is not. These learnings do not happen during a forty-minute visit. They accumulate through presence — the slow traveler’s primary resource. Slow travel produces cultural literacy in a way that rapid tourism cannot, because cultural literacy requires time spent simply observing and adjusting, not time spent rushing toward the next monument.

The ultimate metric of successful slow travel, from a community perspective, is whether the residents of a destination feel that your presence improved their day — not because you spent money, but because you treated their home with the curiosity and respect it deserves. That standard is harder to measure than revenue per tourist, but it matters more. And it is achievable only at a pace slow enough for genuine human exchange to occur. Slow travel’s greatest gift to the communities it touches is not economic, though the economic benefits are real. It is the restoration of dignity to the encounter between traveler and resident — the slow travel acknowledgment that you are a guest in someone’s home, not a customer in someone’s theme park. When slow travel achieves this, both sides of the exchange leave richer than they arrived.