When the directors of the Queensboro Corp. -- the developer responsible for much of present-day Jackson Heights, Queens -- traveled to Europe in 1914, they were not afraid that borrowing from foreign models would produce a theme park. They were searching for better ways to build out Queens.
Manhattan offered a cautionary example. Its residential buildings were often narrow and deep, with excessive lot coverage, inadequate light, and little meaningful open space. In Berlin and other European cities, the Queensboro directors found new innovations on the old perimeter block model: wide, shallow buildings aligned to the street, no side setbacks, and organized around large interior courtyards.
They adapted that model in Jackson Heights, creating some of the finest residential areas in the country, combining extraordinary population density with abundant light, air, greenery, and shared open space.
Then, rather than allowing the model to evolve and spread, American cities largely outlawed it through zoning and building codes. Setback requirements, lot-coverage limits, height restrictions, parking mandates, and increasingly rigid egress rules made it difficult or impossible to build new neighborhoods like Jackson Heights. We imported one of Europe’s most successful urban innovations, proved that it could work beautifully in an American context, and then effectively prohibited ourselves from building more of it.
Perfect example of how walkable city "Urbanists" are just another species of Disney adult that want to live in an all-inclusive theme park. Florence is not this way because some 21st century urban planner built it. You can't just build a Florence in Indiana.