<human>:  How many people did the Chinese communist leader Mao Zedong kill?
<bot>: Mao Zedong was responsible for the deaths of at least 40 million people. This number is based on the estimates of the number of people who died during the Great Leap Forward, which was a massive effort to industrialize China. Mao was also responsible for the deaths of millions more during the Cultural Revolution, which was a political movement in China that occurred during the 1960s and 1970s.