Actually, it can be said that title belongs to Rachel Carson.
She set in motion a chain of events that led to the banning of DDT, followed by 50 million excess malaria deaths in Africa.
Good point. And she was greatly assisted by the EPA and other idiots around the world and it continues to this day.
Rachel Carson, the mother of fake science. Her foolish ideas are indeed responsible for millions of deaths, but only because governments embraced them rather than rejected them out of hand.
Actually, it can be said that title belongs to Rachel Carson.
—
The title is held by Mao Zedong who murdered over 74 million people. Carson is not even close to Stalin with 69 million murders.