Richard Green (6 June 1936 – 6 April 2019) was an American-British sexologist, psychiatrist, lawyer, and author known for his research on homosexuality and transsexualism, specifically gender identity disorder in children.

In 1960, they published the paper "Incongruous Gender Role: Nongenital Manifestations in Prepubertal Boys," detailing their observations of 5 male children who "showed incongruities in gender role", ranging from preferring to play with girls to praying God would change them into a girl.

"[7][9] In 1968, Green published "Childhood Cross-Gender Identification", a paper reviewing the therapy of nine young male children who were younger than 8 and "clearly prepubertal".

Citing the failure of attempts to "cure" adult trans women, he reported early diagnosis and treatment may be effective in preventing manifestations of adulthood cross-gender identification.

Additional focus is on the masculinity-inhibiting of mother's anxiety over her son's healthy aggression and her greater comfort with what to her is his less threatening behavior.

Believing family disturbance to be the cause of gender incongruity, they stated "General principles of therapy are aimed at accomplishing four objectives: (1) Development of a relationship of trust and affection between the male therapist and the boy.

(4) Sensitization of the parents to the interpersonal difficulties which underlay the tendency of the mother to be overly close with the son and for the father to emotionally divorce himself from family activities."

In another case treated by Newman he stated he established a warm and friendly relationship to explain feminine behavior was "not right" for a little boy and that he should give it up.

In another case treated by Newman, he explained to the patient they'd have to stop feminine behavior now before it's too late, and in a few weeks, the child announced they wanted to "become normal like the other boys," motivated by strong religious commitment.

In a case treated by Green, he made an effort to establish paternal control of the family to shift the child's perception of gender roles.

[14] In 1979 Green was a founding committee member of the Harry Benjamin International Gender Dysphoria Association and served as president from 1997 to 1999.

Clinical vignettes from Green's work on gender identity disorder appear in widely used textbooks, such as Kaplan and Sadock's Synopsis of Psychiatry (10th ed.

New York, Basic Books.He served on the American Psychiatric Association DSM-IV Subcommittee on Gender Identity Disorders.

[21] Green applauded the eventual APA decision while strongly criticizing the fact that the administration put it to a vote, saying that such "a shotgun marriage between science and democracy" was "ludicrous".

[21] In his work, on gender identity in children, Green used common English expressions like "sissy boy" and "tomboy" in the titles of some of his publications.

[22] In 2002, he initiated a debate in a special issue of the Archives of Sexual Behavior regarding the extent to which pedophilia should be classified as a mental disorder by the American Psychiatric Association, without impinging on the legal and law enforcement aspects.