Joseph Overton
He is known for having come up with the idea of the Overton Window a theory about how political ideas that were once unacceptable become mainstream or how ones that were once mainstream become unacceptable. Overton came up with the idea to explain the need for think tanks like the one where he worked. Overton had Lawrence Reed as the best man at his wedding in 2003 and Overton and his wife died in a plane accident a few months later.