[1] See for estimates of periods ch. xiv; also, for the peacefulness of these early peoples, Havelock Ellis on "The Origin of War," where he says "We do not find the WEAPONS of warfare or the WOUNDS of warfare among these Palaeolithic remains . it was with civilization that the art of killing developed, i. within the last 10,000 or 12,000 years when Neolithic men (who became our ancestors) were just arriving."英文原著 · 《Pagan and Christian Creeds》