“What Research Shows” is the most comprehensive scholarly review ever done of more than 125 years of clinical experience and research into the nature of homosexuality, its treatment, and the many health problems associated with the homosexual lifestyle. The research and clinical experience show conclusively that homosexuals are not “born that way,” that it can often be successfully treated, that the therapy is not harmful, and that there is a wide range of mental and physical health problems associated with the homosexual lifestyle.