40 years? You are wwwaaaayyy short VV!<quoted text>
Same-gender marriage is nothing new either. Couples have been trying to have their marriages legalized for over 40 years.
And I'm sure that when interracial marriage started here in the U.S. it was considered unthinkable to the vast majority of citizens--just like you think same-gender marriage is unthinkable.
Now we don't even give interracial marriages a second thought.
Marriage laws have evolved in this country. There is no denying that.
At one time it in the U.S. was legal for people to marry as young as 12 years old. And in some parts of the developing world, that's still possible.
You guys seem to think that marriage has been static and unchanging for thousands of years. But you know that isn't the case.
Whether it's been between one man and one woman, one man and multiple women, one woman and multiple men, a man and a man, a woman and a woman, one man (or woman) and deceased people (look up "ghost marriages"), arranged marriages--the fact of the matter is that marriage has looked very different over time and throughout the different cultures on this planet.
That we are evolving marriage to include same-gender couples is just another example of the changes in the definition of marriage.
ss couples have clearly covertly existed since human history began. However, for some reason, not a single culture ever accepted them from start to finish. No where did calling ss couples 'married' pop up, establish itself and spread.
The other examples you list? Been around and practiced in many places.
Quite an astounding difference.