Chapter 8 examines the role of the Communist Party, by far the largest Left group, during the 1930s and 1940s. It looks at the Party’s complex behavior, its many pluses and minuses, and its ties to the Soviet Union. In particular, it examines the role of CP activists as trade union militants and as the unabashed and unrelenting champions of civil rights, a role that distinguished them from the members of all other interracial organizations during this period. Yet it also looks at the Party’s role in demoralizing and destroying the left-wing movement in the 1930s and 1940s, even undermining many of the organizations and movements it had helped create, including those dedicated to civil rights.