A person who studies or specializes in anthroponomy; a scholar of human laws, customs, and the principles governing human life.
From anthroponomy + -ist (specialist or practitioner). The -ist suffix marks someone professionally engaged in studying or practicing a field.
A modern anthroponomist might be called a sociologist or anthropologist, but the older term reminds us these fields originated in trying to find universal 'laws' of human nature.
Complete word intelligence in one call. Free tier — 50 lookups/day.