We used to use leeches to bleed the sick. We don't do that anymore. We used to bake bread and sing songs. We still do those things.

We can't learn from the past unless we actually evaluate the good and bad results they got.

If homosexuality is so bad, why was it common practice in Ancient Greece? Where is the burden of proof? Do Americans today have to prove that being gay is alright? or do 1950s Americans have to prove that being gay is a harmful abomination?