““The depopulation of rural America at the time, accelerated by the technological revolution that was rendering farm labor superfluous, was one of the most harrowing and large-scale demographic developments of the 1940s, 1950s, and 1960s. Because relatively few American officials attended to the problems of these people in the 1950s, the mass migrations set the stage for social and racial dynamite that exploded in the cities after 1965.73””