 Over the last decade of his life, Zhou's ability to implement Mao's policies and keep the nation afloat during periods of adversity was so great that his practical importance alone was sufficient to save him (with Mao's assistance) whenever Zhou became politically threatened.At the latest stages of the Cultural Revolution, in 1975, Zhou pushed for the "Four Modernizations" in order to undo the damage caused by the Mao's policies.During the later stages of the Cultural Revolution, Zhou became a target of political campaigns orchestrated by Chairman Mao and the Gang of Four.