During their four years in power, the Khmer Rouge overworked and starved the population, at the same time executing selected groups who they believed to be enem

During their four years in power, the Khmer Rouge overworked and starved the population, at the same time executing selected groups who they believed to be enemies of the state or spies or to have the potential to undermine the new state. People who they perceived to be intellectuals or even those that had stereotypical signs of learning, such as glasses, would also be killed. - Wikipedia