CHAPTER I. INTRODUCTION. Homosexuality Among Animals--Among the Lower Human Races--The Albanians--The Greeks--The Eskimos--The Tribes of the Northwest United States--Homosexuality Among Soldiers in Europe--Indifference Frequently Manifested by European Lower Classes--Sexual Inversion at Rome--Homosexuality in Prisons--Among Men of Exceptional Intellect and Moral Leaders--Muret--Michelangelo--Winkelmann--Homosexuality in English History--Walt Whitman--Verlaine--Burton's Climatic Theory of Homosexuality--The Racial Factor--The Prevalence of Homosexuality Today..