Was Greece the birthplace of humanity?

[Mav]

@Mav, does that by definition make a term like "Sexism" redundant because it can be replaced with "Racism"?

Isn't gender an equally valid feature or identity?

What about LGBTI, etc., etc., are they unique and shared collective quality or identity?

Usually, the general gives way to the specific, so sexism would be used. 

In legislation, words are usually defined specifically, so such arguments are avoided.  But English is an unregulated language, so ultimately it's how words are used which counts rather than existing dictionary definitions.  "Gay" used to mean happy and lively, but now you would rarely use it in that sense when referring to a person.