The Profits of Religion (An Essay in Economic Interpretation)
First published 1900 · English · 252 pages
- Religion and spirituality

The Profits of Religion is a work of non-fiction in which Sinclair argues that organised religion has often served the interests of wealth and power rather than ordinary believers. He surveys churches, clergy and institutions, and criticises what he sees as their ties to money and their silence on injustice. It is a polemical essay, strongly one-sided, and is best read as a statement of his radical views.