section_path: History/20th century
section_name: 20th century
paragraph_text: 20th century
  
  New Orleans' economic and population zenith in relation to other American cities occurred in the antebellum period. It was the nation's fifth-largest city in 1860 (after New York, Philadelphia, Boston and Baltimore) and was significantly larger than all other southern cities. From the mid-19th century onward rapid economic growth shifted to other areas, while New Orleans' relative importance steadily declined. The growth of railways and highways decreased river traffic, diverting goods to other transportation corridors and markets. Thousands of the most ambitious people of color left the state in the Great Migration around World War II and after, many for West Coast destinations. From the late 1800s, most censuses recorded New Orleans slipping down the ranks in the list of largest American cities (New Orleans' population still continued to increase throughout the period, but at a slower rate than before the Civil War).
  
  In 1929 the New Orleans streetcar strike during which serious unrest occurred. It is also credited for the creation of the distinctly Louisianan Po' boy sandwich.
  
  By the mid-20th century, New Orleanians recognized that their city was no longer the leading urban area in the South. By 1950, Houston, Dallas, and Atlanta exceeded New Orleans in size, and in 1960 Miami eclipsed New Orleans, even as the latter's population reached its historic peak. As with other older American cities, highway construction and suburban development drew residents from the center city to newer housing outside. The 1970 census recorded the first absolute decline in population since the city became part of the United States in 1803. The Greater New Orleans metropolitan area continued expanding in population, albeit more slowly than other major Sun Belt cities. While the port remained one of the nation's largest, automation and containerization cost many jobs. The city's former role as banker to the South was supplanted by larger peer cities. New Orleans' economy had always been based more on trade and financial services than on manufacturing, but the city's relatively small manufacturing sector also shrank after World War II. Despite some economic development successes under the administrations of DeLesseps "Chep" Morrison (1946–1961) and Victor "Vic" Schiro (1961–1970), metropolitan New Orleans' growth rate consistently lagged behind more vigorous cities.