Upton Sinclair 
The Profits of Religion: An Essay in Economic Interpretation 

An eye-opening condemnation of the economic sins of organized religion. Throughout his adult life Upton Sinclair was an unapologetic idealist and a tireless crusader for the rights of the common man. In this powerful and scrupulously researched critique, he argues that organized religion is a gargantuan moneymaking operation in collusion with industry in their shared quest to strike down dissent while bleeding profits from the millions in their thrall.