Somewhere between the garden that was Eden and the new Jerusalem is the street where you live. The one I knew first was Twelfth Avenue, a lane marked by curb and gutter in a neat 1950s neighborhood of low rooflines and wide, short driveways. But it was close to main thoroughfares, and on a clear day my mom and I could walk to collect my brother from school and we knew the name of every neighbor and merchant we might pass along the way.

Then came Brantley Road, a tar-and-gravel road in an ever-expanding "subdivision." To be legitimate we had to plant a regulation mailbox on a post at the street and take the bus to school. The road to anywhere from there wound through pine woods, crossed rail tracks and a river before hitting the first stoplight that meant "town."

Now the subdivision lies fast-bound by eight-lane highways, office parks, chain hotels, and (of course) Starbucks. Neighbors are friendly but transient. An ever-expanding school district means children are more likely to go to school 10 miles away than two, and are more likely to find pals on a club soccer team or at a strip-mall gym than to find them up the street as I did.

My childhood enclave in Richmond, Va., has morphed into that icon of 21st-century American development: the suburban bunker. There a typical family can concentrate its assets (and debts) on a small piece of real estate that hosts an outsized home in a neighborhood gated or seductively landscaped into a fortress. This prompts those so landed to enter their lonely vehicles and drive inordinate distances to carry on commerce not with the local grocer or the butcher or the hardware man but with a sales associate who reports to a corporation leagues removed from anywhere.

This "galactic metropolis" (as social critics dub it) has some efficiencies and benefits. Thanks to the corporate retailers, the cost of school supplies, groceries, clothing-even a gallon of gasoline-is lower in relative terms than in my parents' inflation-driven days. French wine, Italian cheese, Brazilian beef, a New York Times, a cappuccino!-luxury goods that were worlds away from my childhood-are now but a few minutes' drive from my childhood home.

Yet for all that, sometimes we grow wistful for that vibrantly woven city, what sociologists textualize as "a living organism based on a web of interdependencies," or what Christian essayist Wendell Berry calls a place "generally loved and competently cared for by its people." We want to know the meat seller again and have the produce man thump a melon for us to make sure it's ripe. We worry: What will happen if the Wal-marts and Costcos of the world fail? Will we be moored in tracts of pavement on an empty retail prairie, forgettable constellations of congestion and sameness that culture critic James Howard Kunstler caustically described in a 1993 book as the "Geography of Nowhere"?

What is certain is that everyone is discovering the city. Rapid urbanization is a global phenomenon, as rural dwellers increasingly take up life in the city or at its swelling fringes. In 1900, 13 percent of the world's population lived in cities. In 1950, 29 percent. And sometime this year, demographers predict the scale will tip a dramatic degree-and more than half the world's population will be city-dwellers. From 732 million in 1950 to about 3.3 billion, the figures represent a quadrupling of urban residents in under six decades. Most of these urban dwellers live in China, India, and the United States.

Equally dramatic is the number of urban areas with 10 million people or more. In 1950 there were two (New York and Tokyo). Today there are 20.

With the rising numbers comes a heightened need for city planning. New Urbanists, an architectural movement that actually began in the 1960s, are discovering new audiences as they challenge traditional notions of urban growth-i.e., mindless sprawl-and propose instead close-knit communities where buildings and streets again are linked, where dense populations may increase both community and commerce, safety even, over the isolating and underplanned stretches of suburbia.

New Urbanist Christians, too, are emphasizing city engagement as "cultural gardening" rather than combat in a war zone.

These people are rediscovering their cities in ways the Greeks had in mind long ago. They called the city polis, from which flow so many words for citizen and civic duties. In forming political systems to govern these towns, the Greeks at times turned from all that had gone before: rule by conquest, tyranny, and tribalism.

Naturally the Greek city had at its center the agora, or marketplace. And what defined these ancient cities were their people: Athens gave the world formal culture and learning; Corinth excelled at trade and debauchery; and Sparta, well, Sparta gave us spartans.

The Greeks were hardly alone in letting worldview determine how to build and organize a place to live. In China, hutongs, traditional courtyard housing, were small in scale, clearly subservient to the walled palace at the city center. In areas conquered by Islam, streets and housing tended to flow downhill from the mosque, also typically a walled affair. Roman cities were the first to plot streets on a grid to ensure order and control, with significant land given over to military parade grounds. And everyone can recall the New England town with a steeple at the center close by a grassy green kept for livestock-open and without walls.

If the Greeks imagined a city for the people at its core, the French made that city beautiful. Baron Haussmann designed the wide boulevards of Paris in much the same way as Frenchman Pierre L'Enfant marked out the avenues and landmarks of Washington, D.C., in the late 18th century, turning, he wrote, "a savage wilderness into a garden of Eden."

And while others pondered the city, Americans gave it new energy. From the commercial venture that was Plymouth Plantation to the West India Company's purchase of Manhattan Island for the legendary price of 60 guilders, Americans fashioned from a relatively recent wilderness what are now three of the 10 wealthiest cities in the world and one of the world's 10 largest.

American cities do not score in the top 10 cities with the best quality of life (a list dominated by Switzerland, Germany, Australia, and New Zealand). Nor do they host the world's largest churches (those can be found in South Korea, Ivory Coast, Chile, and Nigeria).

But if Americans are known to "pave paradise and put up a parking lot," they are not the first. The Greeks built rut roads 16 or more feet wide-in one instance hacking through mountains and adding bypasses from Athens to the city's marble quarries at Mount Pentelicus. The Romans flattened shops and colonnaded homes to widen the Straight Street in Damascus so it would accommodate passing chariots. And the French paved over tenement housing and picturesque alleyways at the direction of Napoleon III to slice Paris into wide boulevards, expansive parks, and radial roads. Critics at the time viewed what would become the city's signature beauty as an imperial plot to speed troop movement and conquest.

For everyone, it's the street where you live that's most vital. WORLD asked its writers for this special issue to report on those where they live, on why their cities are unique and dynamic. And to report on cultural gardening overseas in cities they have visited and loved. Wherever the streets, Christians know that they are on a pilgrimage, somewhere between the garden that was in Genesis and the garden-city laid out in Revelation. The Tree of Life presides over both, but for now we tend to see death reigning. We look at the city's headaches and heartaches-congestion, prejudice, poverty, violence, war-and too often flee, missing the call of God in Jeremiah to "seek the welfare of the city where I have sent you."

City Profiles

U.S. Cities

San Diego: Catchin' the wave, by Lynn Vincent

Seattle: Books, books, books, by Mark Bergin

Dallas: Not in my backyard, by John Dawson

Charlotte: West Side story, by Jamie Dean

New York: Bullish on the Big Apple, by Mindy Belz

World Cities

Jerusalem: Jerusalem by foot, by Marvin Olasky

Casablanca: Atlantic allies, Mindy Belz

New Delhi: Melting pot, by Jamie Dean

Shanghai: Shanghai blues, by Becky Perry

Lusaka: Gardening and garbage, by Priya Abraham