Conversation so far:
What was one of Ngo Dinh Diem's most famous socio-economic policies?
Brothels and opium dens were closed, divorce and abortion were made illegal, and adultery laws were strengthened.

Question: What is an example of a program that he started to reform society?
Self-contained rewrite: What is an example of a program that Ngo Dinh Diem started to reform society?