By far the most interesting chapter to me in Freakonomics, is the chapter on abortion. Abortion, no matter how you stand on it religously or politically is eugenics at its finest. I am a strong believer that a childs future success, well being, and integrity have a lot to do with how the child is raised. With that being said, the ideal parent for raising a successful child with a high self esteem, are parents that really want a child, want to start a family, have thought about all the obligations of having a child, and then intentionally get pregnant then raise their kid. On that same note, the people who wouldn't be the ideal parents are the people who got black out drunk at a party and forgot to use a condom, people who are not going to stay together after the woman gets pregnant, and people who have not thought about all the obligations a child entails and are not financially prepared to bring such an expensive thing into this world (a child).
What does abortion do? Abortion allows many of the would be parents who are not the "ideal parents" get rid of their baby, before it becomes a baby. Abortion leaves a higher percentage of "ideal parents" having children then if abortion is illegal. While this does not affect the crime rate today, it does eliminate that child who will car jack you 22 years down the road. Abortions today lower crime rates 15-25 years in the future as the children who would be growing up in the broken home with their life trajectory looking at being a crack selling foot soldier, are not being born. I don't think any woman should ever be told that she does not have the choice to do what she wants with her body. It's her child, it should be her decision, and propositions like the one in California making woman under 18 get parents consent for an abortion are dangerous as if that prop were to pass then many more teenagers would be having kids and those kids would be the one's who are going to key my Maserati 15 years down the road.