Teach your children well.
One thing that's really jumped out at me from the comments on my 20 year muggiversary is all you wonderful men who are concerned about the females in your lives. This is an issue in which reality has a stark, cold break with the inanity of popular ideology: to lie back and think of England is not an option. If you can not teach your daughters to defend themselves, it is incumbent upon you to get them to whatever martial arts/self defense training best works with their learning methods, and when possible, arm them with the ultimate of equalizers. I'm not being politically correct there, either - I'm an audio/kinesthetic learner. I retain more of a lecture if I'm doodling and listening. You need to help your girls recognize what style works for them, and as one particularly astute blogger noted, find a self-defense teacher or system that works with the way their particular brain is wired.
One of my favorite movies is The Edge, and it cites an aboriginal legend of a rabbit and a couger. It asks why is the rabbit unafraid of the cougar and the answer is the rabbit is smarter than the cougar. Women need to find the way to tap their inner strengths and make the most of them, because we do not have size and strength on which to rely.
I have to say your belief in and encouragement of the strength and cunning of your daughters and wives is the best investment you could make. Thank heaven for little girls, eh? The balance between what's great about men and what's great about women is a profound thing.
Thank you for the validation of the young woman I was who felt very alone 20 years ago. I was so sure I was right.
May your women kick every bit of ass that trifles with them.