""The Prehistoric Worlds or Vanished Races"" is a comprehensive study of the prehistoric era, written by E.A. Allen. The book delves into the mysteries of the past, exploring the vanished civilizations and races that once inhabited the earth. It covers the geological history of the earth, the evolution of life, and the emergence of humans. The book also discusses the various theories and discoveries related to prehistoric times, including the study of fossils, cave paintings, and ancient artifacts. The author provides a detailed account of the lifestyles, cultures, and beliefs of the prehistoric people, and how they adapted to their environment. The book is a fascinating read for anyone interested in history, archaeology, or anthropology, and provides a unique perspective on the origins of human civilization.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.