A new history of the eugenics movement sheds light on a bizarre chapter in U.S. history .
Less than 100 years ago , America 's finest minds were convinced the nation was threatened by sexually insatiable female morons .
A new history of the eugenics movement sheds light on a bizarre chapter in America history .
Less than 100 years ago , America 's finest minds were convinced the nation was threatened by sexually insatiable female morons .