That might actually be untrue. If you look back on history, women were, for the majority of the time, treated as property. As for the rough and tough guys, they were the most powerful, therefore they got the "pick" of the pack. Today, women tend to have a choice in the matter. Excluding arranged marriages and etc. So they pick who they want to be with. So, it might not be that women have changed as much as our rights and upbringing. And if they did prefer them, it might have been because they needed protection, now we can go out and buy pepper spray.