The Pullman Company, founded by George Pullman, was a manufacturer of railroad cars in the mid-to-late 19th century through the first half of the 20th century, during the boom of railroads in the United States. Through rapid late-19th century development of mass production and takeover of rivals, the company developed a virtual monopoly on production and ownership of sleeper cars. During a severe economic downturn, the 1894 Pullman Strike by company workers proved a transforming moment in American labor history. At the company's peak in the early 20th century, its cars accommodated 26 million people a year, and it in effect operated "the largest hotel in the world". Its production workers initially lived in a planned worker community named Pullman, Chicago. Pullman developed the sleeping car, which carried his name into the 1980s. Pullman did not just manufacture the cars, it also operated them on most of the railroads in the United States, paying railroad companies to couple the cars to trains. In return, by the mid-20th century, these railroads would own Pullman outright. A labor union associated with the company, the Brotherhood of Sleeping Car Porters, founded and organized by A. Philip Randolph, was one of the most powerful African-American political entities of the 20th century. The company also built thousands of streetcars and trolley buses for use in cities. Post-WWII changes in automobile and airplane transport led to a steep decline in the company's fortunes. It collapsed in 1968, with a successor company continuing operations until 1981.