The historical period prior to the emergence of the Civil Rights Movement brought tremendous changes to the African-American community. Perhaps the most important single change was the transition African Americans experienced moving from the rural South to the urban North. In 1910, for example, only ten percent of all blacks lived in the North. By 1940, twenty-two percent lived in the North, and by 1960, nearly one-half lived outside of the South. African Americans also changed their occupations during these years. In 1930, forty-two percent of all Black workers were in agriculture and another twenty-two percent were domestic household workers. By the 1950s, the largest single group of Black workers were in manufacturing, transportation, and industry. As the Black working-class grew, the political demands of the African-American community for voting rights and for the end of legal racial segregation increased. The growing economy and social power of Black working class and middle class people began to impact the American political system. In early 1948, NAACP journalist Henry Lee Moon predicted that Negros would one day become the balance of power controlling the outcome of presidential elections. Many people did not take his thesis seriously. Most Blacks still lived in the South and they were disenfranchised from voting. However, in the presidential election of 1948, Henry S. Truman defeated New York Governor, Thomas Dewey, in a close contest largely due to the support Truman received from African-American voters. Truman had outlawed racial segregation in the U.S. Army and he supported a modest civil rights bill in Congress earlier that year. Negros responded by strongly supporting Truman over Dewey. It marked the first time that Black voting strength would determine the outcome of the selection of president; it would not be the last.