The summer of 1919 is over, and on the high prairie, a small army of men, women, and machines moves across the land, bringing in the wheat harvest. Custom threshers, steam engineers, bindlestiffs, cooks, camp followers, and hobos join the tide. Prosperous farmers proudly proclaim "Rain follows the plow," meaning that the bounty of the land will never be exhausted. Everywhere, people gleefully embrace the gospels of progress and greed. The threshing...