100000BC to the 1980s would like to have a word with you?
My point here isn't necessarily to defend it but to demonstrate that you need to be trying harder to avoid dogmatic thinking. Parts of the world still happily practice child marriage, how are you going to convince them?
I would be inclined to add, "in modern society" to that phrase and leave it at that. No need to excuse or condemn the past or cultures that still haven't gone through the humanitarian enlightenment of western society.
It's pretty interesting to assert that ~100k years of doing things a certain way is wrong. Do you have the evidence to assert such a thing?
The posts above talking about reversing the genders are kind of right, but that does already exist: it's pretty common for lower class middle school/highschool aged girls to sell their bodies for drugs, alcohol, or just money. This is tolerated in those communities and is seen as "the thing you do while growing up."
My point here isn't necessarily to defend it but to demonstrate that you need to be trying harder to avoid dogmatic thinking. Parts of the world still happily practice child marriage, how are you going to convince them?