This dissertation tells the story of how anticommunism operated on the state and local level in Massachusetts from the depression through the 1950s. Using analytic tools from both political history and social history, it asks: what initiatives were driven by anticommunism, who were the people behind these initiatives, why did they want to suppress political dissent, and where did their ideas originate. The findings show that anticommunism on the state and local level was far more complex than has been appreciated. In Massachusetts, political ideas travel through a prism of class and ethnicity before taking shape as political actions. Neither the pluralist analysis of McCarthyism as a mass based movement from below, nor the revisionist analy...