During the 20th century, the mean center of the United States population moved 324 miles west and 101 miles south.
"Per capita income jumped 140% from 1940 to 1945, compared to 100% elsewhere in the United States
=== 1940s through late 20th century ===World War II marked a time of dramatic change within the South from an economic standpoint, as new industries and military bases were developed by the federal government, providing much needed capital and infrastructure in many regions

