How much of the Great Chinese Famine's death toll came from Great Leap Forward policy failures as against genuine natural disaster, and how many people actually died?

Death toll estimates range roughly from 15 to 55 million depending on source and method; researcher Basil Ashton notes weather worsened the harvest but says it is impossible to assess how much responsibility belongs to policy against drought and flooding, and the government's own account emphasizes natural disaster over policy.