What caused collapse?

What went wrong.

Male supremacy culture

"Misogyny is tyrannical. It punishes any woman who does not comply with the standards of the patriarchy. The system does not hate all women: it hates, punishes, and persecutes women who do not comply with the subject: the man, the patriarch. In the patriarchal setup, everything is defined and subjected to the maleness of society, while the rest are other."

https://opinion.inquirer.net/195728/patriarchy-misogyny-and-sexism-the-underlying-power-play

Trump is Western Man