Adam Rapacki (24 December 1909 – 10 October 1970) was a leading Polish Communist politician and diplomat from 1947 to 1968. He started in the socialist movement but in 1948 joined the Central Committee of the new Polish United Workers' Party (PZPR), and became a member of its Politburo. It had very close ties to the Kremlin. He is best known for his 1957 proposal for the creation of nuclear-free zones in Europe; it was never adopted. He maintained good relations with East Germany while warning against West German expansionism. Piotr Wandycz finds that he was well educated, cosmopolitan, pragmatic, liberal and ambitious, and imbued with a sense of patriotism and belief in cooperation with the left in Western Europe.