Boris Sidis eventually opposed mainstream psychology and Sigmund Freud, and thereby died ostracized.

He proceeded to complete four degrees at Harvard University and sought to provide insight into why people behave as they do.

Due to the May Laws, he was imprisoned for at least two years, according to William James Sidis' biographer, Amy Wallace.

He sought to provide insight into why people behave as they do, particularly in cases of a mob frenzy or religious mania.

Sidis applied his own psychological approaches to raising William in whom he wished to promote a high intellectual capacity.