After the end of World War I, American society has undergone a big change. None of the countries participating in the global conflict between 1914 and 1918 experienced social, political and economic prosperity like the United States. The American middle class suddenly became the most important part of American economic growth. With the purchase of luxury cars, especially automobiles, the middle class has become more familiar, opportunities in the housing and labor industries are expanding.
Construction of large corporate headquarters and skyscrapers has often proven to be an indication of an economic peak. At the beginning of the Great Depression, the Empire State Building was planned and construction began. Willisville, originally known as Sears Tower, began construction before the stock market crash of 1973-74. Burj Khalifa is now the tallest building in the world and is under construction at the beginning of the 2008 global financial crisis.
Disintegration of Waldorf - Astoria began in October 1929, and the foundation of the Empire State Building was discovered before being dismantled or completed. The building itself started construction on March 17, 1930 at the average construction speed on the first floor of the day. A well-coordinated schedule means that 86 stories have been completed on September 19, six months after construction began, and the mast was completed on 21 November. Since then, the internal work has proceeded rapidly and opened in May 1931. The first steel beam was built for 13 months and a half. Despite the propaganda surrounding the construction of the building, its owner did not start making profits until the early 1950s. However, it has become a popular tourist attraction since opening, and there are about 4 million visitors each year.