Evidence..seems to be a talking point of yours. Well, let me share something with you as a student of the social sciences; when it comes to the study of all of man's social mechanisms there are no absolutes, no 'proofs'. All one can do is cite what we hold to be accurate dates and events of history or facts/extracts from texts- like the Constitution for example.   Everything else is subjective, fleeting and subject to change based on change-like how public opinion can be readily change