"Some believe that the United States is already experiencing the eugenic effects of abortion. According to one economist, “ Roe v. Wade help[ed] trigger, a generation later, the greatest crime drop in recorded history.” S. Levitt & S. Dubner, Freakonomics 6 (2005); see id., at 136–144 (elaborating on this theory). On this view, “it turns out that not all children are born equal” in terms of criminal propensity. Id., at 6. And legalized abortion meant that the children of “poor, unmarried, and teenage mothers” who were “much more likely than average to become criminals” “weren’t being born.” Ibid. (emphasis deleted). Whether accurate or not, these observations echo the views articulated by the eugenicists and by Sanger decades earlier: “Birth Control of itself . . . will make a better race” and tend “toward the elimination of the unfit.” Racial Betterment 11–12."