In the early 1950s, the People's Republic of China and the Soviet Union (USSR) were the two largest Communist states in the world. Although initially they had been mutually supportive, disagreements arose after the death of Joseph Stalin and the rise of Nikita Khrushchev to power in the Soviet Union. In 1956, Khrushchev denounced Stalin and his policies, and began implementing post-Stalinist economic reforms. Mao and many other members of the Chinese Communist Party (CCP) opposed these changes, believing that they would have negative repercussions for the worldwide Marxist movement, among whom Stalin was still viewed as a hero.