The Myths of the New World by Daniel G. Brinton

It is a study of an obscure portion of the intellectual history of our species as exemplified in one of its varieties. What are man’s earliest ideas of a soul and a God, and of his own origin and destiny? Why do we find certain myths, such as of a creation, a flood, an after-world; certain symbols, as the bird, the serpent, the cross; certain numbers, as the three, the four, the seven—intimately associated with these ideas by every race? What are the laws of growth of natural religions?