In Deep Souths, J. William Harris looks at three distinct regions in the American South from Reconstruction through the Great Depression. The regions are similar in that they all had majority black populations before the Civil War, with economies dominated by slave plantation agriculture. However, the economies of these regions diverged once the war was over. The Georgia sea-island culture of long-staple cotton and rice collapsed in the late 1800s, as the extremely labor-intensive work of maintaining ditches and dams could not survive a free-labor regime. The eastern Piedmont of Georgia made the conversion from plantation agriculture to sharecropping and expanded cotton production until 1920. But low cotton prices and the boll weevil crippled this economy by the beginning of the Depression. The Mississippi Delta, on the other hand, witnessed a major capital expansion as the swampy wilderness of antebellum times was converted into the South's premier cotton production center.