Gender
Thinking of gender in this way can lead to a society with strict gender roles that are in place for a long time to think that those are natural or biological roles that each option has to conform to at birth. Examples of this are women who are not allowed access to education or jobs or men who are expected to not be emotional or soft. Strict binary gender roles are also often tied to reasons for oppression of sexualities outside of the majority. Societies often enforce gender binaries due to concepts like tradition and the idea that their stability relies on keeping this binary in place.