[Answer] 1. This leader was in charge of the Khmer Rouge communist movement in Cambodia. His attempts to "cleanse" Cambodia resulted in millions of deaths.

Step 1 : Introduction to the question "1. This leader was in charge of the Khmer Rouge communist movement in Cambodia. His attempts to "cleanse" Cambodia resulted in millions of deaths."

...1. Pol Pot 2. Kim Il-Sung 3. Kim Jong-Il 4. Tou Samouth Pol Pot was the leader of Cambodia's "Khmer Rouge" communist movement. It is estimated he caused between 1.7-2.5 million deaths. He favored "agrarian socialism", which involved relocating people from towns to rural environments to work on his "special projects." Pol Pot, whose original name was Saloth Sar, wanted a new beginning, a "Year Zero." About 20% of the Cambodian population died at the hands of Pol Pot's leadership. His cruel reign was brought to an end during the Cambodian-Vietnamese War of 1978-79. Tou Samouth was Pol Pot's mentor. Kim Jong-Il and Kim Il-Sung are both North Korean despots.

Step 2 : Answer to the question "1. This leader was in charge of the Khmer Rouge communist movement in Cambodia. His attempts to "cleanse" Cambodia resulted in millions of deaths."

Pol Pot:

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