This raises a very interesting point I haven’t seen elsewhere.
The demographics of birthrates by ethnic group have long been known. There were many abortions before Roe v. Wade, but the number sharply increased after 1973.
But assuming that Roe v. Wade never happened, solely based on known demographic trends, it should be able to approximate, to start with, how many more Americans there would be.
Second, what the ethnic breakdown of these Americans, and the children they probably would have had, would be.
And third, how this would have changed, if at all, the ethnic makeup of America today.
For example, right now about 12% of Americans are black. Without Roe, would that *percentage* be appreciably greater?
That kind of sounds like the Freakonomics view that abortion reduces crime. I think there are too many variables to say that it does.
http://www.freakonomics.com/2005/05/15/abortion-and-crime-who-should-you-believe/