Increasing freedom of gender expression and growing awareness of human variation are both forms of social progress. But the fact that gender dysphoria now often appears in social clusters (such as a group of close friends),[71] the fact that parents and those who transition back to their natal sex identify social media as a major source of information and encouragement,[72] and the fact that gender dysphoria is now being diagnosed among many adolescents who showed no signs of it as children[73] all indicate that social influence and sociogenic transmission may be at work as well.
