"The Court is unquestionably correct in concluding that the doctrine of stare decisis has controlling significance in a case of this kind, notwithstanding an individual justice's concerns about the merits.1 The central holding of Roe v. Wade, 410 U.S. 113, 93 S.Ct. 705, 35 L.Ed.2d 147 (1973), has been a "part of our law" for almost two decades. Planned Parenthood of Central Mo. v. Danforth, 428 U.S. 52, 101, 96 S.Ct. 2831, 2855, 49 L.Ed.2d 788 (1976) (STEVENS, J., concurring in part and dissenting in part). It was a natural sequel to the protection of individual liberty established in Griswold v. Connecticut, 381 U.S. 479, 85 S.Ct. 1678, 14 L.Ed.2d 510 (1965). See also Carey v. Population Services Int'l, 431 U.S. 678, 687, 702, 97 S.Ct. 2010, 2017, 2025, 52 L.Ed.2d 675 (1977) (WHITE, J., concurring in part and concurring in result). The societal costs of overruling Roe at this late date would be enormous. Roe is an integral part of a correct understanding of both the concept of liberty and the basic equality of men and women."