The Cultural Revolution in the People's Republic of China started in 1966 and lasted about a decade. This revolutionary upsurge of Chinese students and workers, led by Mao Zedong, wreaked havoc in the world's most populous country, often turning things upside down and undermining the party, government, and army while simultaneously weakening the economy, society, and culture. Tens of millions of people were killed, injured, or imprisoned during this period and relatively few benefited, aside from Mao Zedong and the Gang of Four, the group that would eventually receive the blame for the events of the Cultural Revolution.