spells out a moral indictment of slavery when he references things such as the high infant mortality rate from overworked pregnant women, and the cruel slave hierarchies established by their masters. He does not write so much on what he had already established in his previous work, and instead focuses on how such an economically efficient system was threatened and ultimately abolished. Using the same measurement techniques he used in his previous work, he analyzed a mountain of evidence pertaining to the lives of slaves, but he focuses much more on the social aspects versus economics this time. He both illustrates how incredibly hard and life-threatening the work of a slave was, as well as how they were able to form their own culture as a resistance to slavery. His main point ultimately comes across, though, as he explains how a small group of very vocal and committed religious reformers led the fight against slavery until it became a political force that captured the attention of the President of the United States. His book delves deeply into why some of America's most widely respected leaders went from seeing slavery as a highly profitable workforce (which his findings indicate as true) to something that must be abolished on moral grounds. The Fourth Great Awakening In 2000 Fogel published The Fourth Great Awakening and the Future of Egalitarianism in which he argued that America has been moving cyclically toward greater equality, largely because of the influence of religion, especially evangelicalism. Building on his work on the demise of slavery, he proposed that since evangelicalism was largely responsible for ending the institution he found to be economically profitable, that religion would continue to fuel America's moral development. Fogel diagrammed four "Great Awakenings", called (by others) "The Fogel Paradigm." "Fogel's paradigm is drawn from what he believes are cycles of ethical challenges America has undergone provoked by technological innovations that create moral crises that, in turn, are resolved by evangelical awakenings." Later work: The Technophysio Evolution Fogel was the director of the Center for Population Economics (CPE) at the University of Chicago and the principal investigator of the NIH-funded Early Indicators of Later Work Levels, Disease and Death project, which draws on observations from military pension records of over 35,000 Union Army veterans. Much of Fogel's late writing incorporated the concept of technophysio evolution, a process that he described as "the synergism between rapid