Extensive historical and clinical evidence demonstrates that homosexuality is a natural variation of sexual orientation rather than a mental illness, leading to its official declassification by psychiatric authorities.
The retrieved literature consistently documents the declassification of homosexuality as a mental disorder by major psychiatric associations (such as the APA) and explores the historical shift from pathologization to viewing sexual orientation as a natural variation. Papers [2], [3], [5], and [9] directly detail this historical evolution and rejection of the illness model, while paper [11] examines the perception of homosexuality as a natural biological variation. There is no evidence supporting the claim that homosexuality is a psychological illness.