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The general public typically traces the death of Jim Crow to Brown v. Board of Education, although the institution was showing signs of weakness years before. By 1945, a growing number of whites in the North had concluded that the Jim Crow system would have to be modified, if not entirely overthrown. This consensus was due to a number of factors, including the increased political factor of blacks due to migration to the North and the growing membership and influence of the NAACP, particularly its highly successful legal campaign challenging Jim Crow laws in federal courts. Far more important in the view of many scholars, however, is the influence of World War II. The blatant contradiction between the country's opposition to the crimes of the Third Reich against European Jews and the continued existence of a racial caste system in the United States was proving embarrassing, severely damaging the nation's credibility as leader of the "free world." There was also increased concern that, without greater equality for African Americans, blacks would become susceptible to communist influence, given Russia's commitment to both racial and economic equality. In Gunnar Myrdal's highly influential book The American Dilemma, published in 1944, Myrdal made a passionate plea for integration based on the theory that the inherent contradiction between the "American Creed" of freedom and equality and the treatment of African Americans was not only immoral and profoundly unjust, but was also against the economic and foreign-policy interests of the United States.
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Michelle Alexander (The New Jim Crow: Mass Incarceration in the Age of Colorblindness)