In a very wicked sense, I almost think Republicans ought to be in favor of NOT outlawing abortion. That way, future Democrats and Leftists will continue to abort their potential replacements.
The book Freakonomics discussing what you are talking about, in a sense. The book says that roe/wade is what later caused a massive drop in crime. The drop in crime can be directly linked to a sudden spike lower in virtually all violent and non violent crimes. The book cites Romania as an example, where they previously had abortion, then Ceucescu(sp?) outlawed it. In a twist of irony, he was later executed by his own people, after young people created the demonstrations to overthrow him.
A cold subject, controversial theory to be sure, the Author has had to defend himself no doubt. He does state that the benefit of much lower crime, is not worth the cost of abortion, even if you could equate 100 fetus, to one life. You could not save one human life, even if you aborted 100 “unwanted” children.
While nothing good can be said for abortion, one of the better things about it is that most of the victims are likely liberals.