Brainstorming...

So, I already had my topic picked out, which was nice. I'm doing my essay on why abortion is detrimental to society. In my brainstorming session(s), I basically tried to figure out what I was going to say. I mean, abortion is wrong, it's murder, but that's not what my essay's about. I have a whole different "target audience". An audience that doesn't necessarily agree with me about when life begins. Why is abortion detrimental to society? How does it hurt us? That's what I tried to figure out.