History of New York City

gration from the American South. By 1916, New York City was home to the largest urban African diaspora in North America. The Harlem Renaissance of literary and cultural life flourished during the era of Prohibition. The larger economic boom generated construction of competing skyscrapers that changed the skyline into its identifiable twentieth-century shape.

New York became the most populous urbanized area in the world in early 1920s, overtaking London. The metropolitan area surpassed the 10 million mark in early 1930s, becoming the first megacity in human history. The difficult years of the Great Depression saw the election of reformer Fiorello La Guardia as mayor and the fall of Tammany Hall after eighty years of political dominance.

Returning World War II veterans created a postwar economic boom and the development of large housing tracts in eastern Queens. New York emerged from the war unscathed as the leading city of the world, with Wall Street leading America's place as the world's dominant economic power. The United Nations Headquarters (completed in 1950) emphasized New York's political influence, and the rise of abstract expressionism in the city precipitated New York's displacement of Paris as the center of the art world.

In the 1960s, job losses due to industrial restructuring caused New York City to suffer from economic problems and rising crime rates, which extended into the 1970s. While a resurgence in the financial industry greatly improved the city's economic health in the 1980s, New York's crime rate continued to increase through the decade and into the beginning of the 1990s. By the 1990s, crime rates started to drop dramatically due to revised police strategies, improving economic opportunities, gentrification, and new residents, both American transplants and new