We know that History is benevolent. Because History marches us to an ever greater awareness of Equality and Human Dignity. And we know that History is powerful. Otherwise, History could not have mowed down all those bigots standing in the way of "marriage equality".
But if History is so benevolent and powerful, then why did it allow same-sex "marriage" to go unrecognized and unaffirmed for so long (millennia, in fact) and why does it still allow the grave evil of the non-recognition of same-sex "marriage" to continue in most of the inhabited world?