I think that the decision you have made sounds right for you, although you appear to feel the need to justify that decision. You don�t really its personal choice and I admire your resolution to that choice.
One thing though, is that the world and its future has always been full of violence and impending doom. In fact, we currently live in an era that is the least violent in human history � if you can believe that! The world was always going to end, missile crisis, IRA and terrorism, nuclear/3rd world war etc. If your parents and mine had really thought about it in the same way, maybe we would never be here to have such a profound impact on those around us and Answerbank!
Also, you never know, your offspring could evolve to be that one person in the world who could solve global warming, find the cure for cancer or end world poverty, or just make someone else forever happy by just being them.