世界連邦運動
Clark and other participants in the Dublin Conference became active in the United World Federalists (UWF) and the global World Federalist Movement. UWF enjoyed some success in the postwar period, as 23 state legislatures passed bills supporting the organization’s goals, but McCarthyism prompted many prominent members to resign lest Senator Joseph McCarthy ruin their careers. In the United States, internationalism came to be associated with communism.