In 1931, Sherwood Eddy stopped his career with the YMCA where he had spent 35 years as a volunteer. He had become a member of the Fellowship of Socialist Christians which was organized in the early 1930s by Reinhold Niebuhr and others on the left. Later it changed its name to Frontier Fellowship and then to Christian Action. The main supporters of the Fellowship in the early days included Eddy, Eduard Heimann, Paul Tillich and Rose Terlin. In its early days the group thought capitalist individualism was incompatible with Christian ethics. Although not under Communist control, the group acknowledged Karl Marx's social philosophy.