Chariots of Gods, written in 1968, holds its importance as it is the first book to have the bizarre theory of aliens stepping on Earth. The author's hypothesis is based on several scientific findings, research, and facts of extraterrestrial intervention on earth. His strangest theory is that we all are descendants of these alien creatures, and he puts forth archaeological discoveries to prove it. He tries to prove that religions are a result of the contact of human race with aliens. Interestingly, he also uses pictures as evidence to convince the readers about his theory.