From ancient Egyptian religions to Judaism, Hinduism to Buddhism, Christianity to Islam, as well as many more, Carus analyses each religion in turn to expose their views of the devil and where those views came from.

He takes the reader from five thousand years ago through to near the present day to give a wide overview of changing views on good and evil and how different civilisations created varying ideas of the devil.

In the last five hundred years of history the devil has appeared to be marginalised as only a literary figure rather than a genuine fear, but Carus demonstrates how throughout the Reformation, the Inquisition and even the nineteenth century, fear of the devil was extremely real.

Paul Carus provides an extremely thorough survey of various ideas about the devil along with what is good and what is evil.

Carus was a pioneering author and thinker of the early twentieth century. He became the first managing editor of the Open Court Publishing Company which aimed to provide a forum for the discussion of philosophy, science, and religion, and to make philosophical classics widely available by making them affordable. As an author he published 75 books and 1500 articles. He died in Februrary 1919.