I can't think of a period in history where most nations were democracies either, where most women could vote, or where most people had access to public education.
But alas, here we are.
But alas, here we are.
I see no reason to believe that democracies with women's suffrage and public education are immune to military competition. I certainly wouldn't want to risk massive upheaval of the world order which jeopardizes the existence of all those things to find out.