About J'ai tiré sur Andy Warhol : « Scum Manifesto »

New York, June 3, 1968. Valerie Solanas enters the Factory, Andy Warhol's studio, and fires three shots at him, who miraculously survives, but is seriously wounded. What led this woman to try to kill the famous pop artist, as well as to write a manifesto calling for the eradication of men?