Something very odd is going on here.
Anthropologists have traditionally categorized societies at the most basic level by their marriage customs, as these are the most basic institutions of society.
Yet here we are in the process of drastically altering our own marriage customs to ones never seen before in any human society, assuming all the time there will be no unforeseen negative effects.
This is societal hubris of the very highest type.
Yep! It's the Triumph of the Will.