First, there should be a major principle/value up front when you create new laws. For example, the society in general wants to protect women, children and marriage. Second, Marriage law can’t exist by its self, it must be related with Child protection and woman related issues. If the society regards women as a group of disadvantaged people comparing with men, it should use law to protect the disadvantaged group. If the society thinks men as a group of disadvantaged people, then it should create a different law to make everyone have equal rights to live in the society.
I don’t know what is the core family value in