Beginning in the early 1900s, Camden was a prosperous industrial city, and remained so throughout the Great Depression and World War II. During the 1950s, Camden manufacturers began gradually closing their factories and moving out of the city. With the loss of manufacturing jobs came a sharp population decline. The growth of the interstate highway system also played a large role in suburbanization, which resulted in white flight. Civil unrest and crime became common in Camden. In 1971, civil unrest reached its peak, with riots breaking out in response to the death of Horacio Jimenez, a Puerto Rican motorist who was killed by two police officers.