The Secret Doctrine: Volume Two - Anthropogenesis

The second half of the book describes the origins of humanity through an account of "Root Races" dating back millions of years. The first root race was, according to her, "ethereal"; the second root had more physical bodies and lived in Hyperborea. The third root race, the first to be truly human, existed on the lost continent of Lemuria and the fourth root race developed in Atlantis. According to Blavatsky, the present fifth root race is approximately one million years old. It overlapped the fourth root race and the very first beginnings of the fifth root race were approximately in the middle of the fourth root race.