720
Opinion of the Court
ing Daniels v. Williams, 474 U. S. 327, 331 (1986)). The Clause also provides heightened protection against government interference with certain fundamental rights and liberty interests. Reno v. Flores, 507 U. S. 292, 301-302 (1993); Casey, 505 U. S., at 851. In a long line of cases, we have held that, in addition to the specific freedoms protected by the Bill of Rights, the "liberty" specially protected by the Due Process Clause includes the rights to marry, Loving v. Virginia, 388 U. S. 1 (1967); to have children, Skinner v. Oklahoma ex rel. Williamson, 316 U. S. 535 (1942); to direct the education and upbringing of one's children, Meyer v. Nebraska, 262 U. S. 390 (1923); Pierce v. Society of Sisters, 268 U. S. 510 (1925); to marital privacy, Griswold v. Connecticut, 381 U. S. 479 (1965); to use contraception, ibid.; Eisenstadt v. Baird, 405 U. S. 438 (1972); to bodily integrity, Rochin v. California, 342 U. S. 165 (1952), and to abortion, Casey, supra. We have also assumed, and strongly suggested, that the Due Process Clause protects the traditional right to refuse unwanted lifesaving medical treatment. Cruzan, 497 U. S., at 278-279.
But we "ha[ve] always been reluctant to expand the concept of substantive due process because guideposts for responsible decisionmaking in this unchartered area are scarce and open-ended." Collins, 503 U. S., at 125. By extending constitutional protection to an asserted right or liberty interest, we, to a great extent, place the matter outside the arena of public debate and legislative action. We must therefore "exercise the utmost care whenever we are asked to break new ground in this field," ibid., lest the liberty protected by the Due Process Clause be subtly transformed into the policy preferences of the Members of this Court, Moore, 431 U. S., at 502 (plurality opinion).
Our established method of substantive-due-process analysis has two primary features: First, we have regularly observed that the Due Process Clause specially protects those fundamental rights and liberties which are, objectively,
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