In an academic conference environment and without touching on Morality, Theology and Tradition, Ryan T. Anderson provides for us a definition of what marriage is from a philosophical and social science approach to appeal to a public policy purpose of marriage. He then explores the role of the state and marriage. What is the state’s interest in marriage? How should the state define marriage? A very well explained lecture on defining marriage, without drawing upon theological arguments.  

If you want to see the entire talk click here: https://youtu.be/YWIhZ5xJJaQ