I present evidence from Rehnquist Court First Amendment speech and religion cases from the 1990s to the present. I ask whether these cases of the mature Rehnquist Court support the thesis that the Supreme Court continues to be in its decision-making and innovative in doctrine as it meets the demands of our more complex and diverse society. I conclude the essay with some thoughts as to why the First Amendment jurisprudence of the mature Rehnquist Court is far more muted than its cases involving privacy, abortion choice, and homosex ual rights, and I suggest what we can expect from the Supreme Court in the future. It was not until the 1991-1992 term that it was possible to begin to decipher the direction that doctrine would take in the Rehnquist Court because it takes a few years for the justices' visions of polity and rights principles ? and their application to constitutional questions ? to coalesce. It was not until the 1991-1992 term that we have what I will call the mature Rehnquist Court, a Court that consisted of a majority of mem bers representing a new era in American Politics, a post-New Deal era in which a majority of justices were selected by conser vative Republican Presidents who began to question many of the assumptions about whether we should have faith in government as compared to economic and social markets as venues of polit ical change. The landmark decisions of the 1991-92 term of the Supreme Court included cases in which the mature Rehnquist Court did not turn its back on precedent or on the tests and principles that had been developed by the Supreme Court under Chief Justice Earl Warren (1953-1969) and Warren Burger (1969-1986).1 Evidence from the landmark cases of the 1991-92 term of the Rehnquist Court support the view that it was constitutive, not simply in its decision-making, as had been the Supreme Court under Chief Justices Warren and Burger. The basic tenets of the approach are the follow ing: 1) the Supreme Court does not make its choices instrumen tally ? that is, it does not choose an outcome and then simply use polity and rights principles to support that outcome; 2) the Supreme Court does not decide cases in ways that are similar to those used by legislative or bureaucratic policy-makers; instead, there is a constitutive decision-making process in which mem bers of the Supreme Court engage in a textured and sincere debate about which polity and rights principles are applicable to a case and how to apply them; 3) the Supreme Court is aware of new ideas, scholarship, and methods of problem definition cre ated by the interpretive community, and over time it incorporates these into its decisions; 4) polity principles, such as when to fol low precedent, when to trust elected bodies or courts, and when to trust different levels and branches of government to make constitutionally important decisions are as important to Rehnquist Court decision-making in these 1991-92 landmark cases as they were in the Warren and Burger Court eras; and 5) the Rehnquist Court, now dominated by Reagan-Bush appointees, like the Court in previous eras, finds justices protect ing their autonomy, and that of the Supreme Court as an institu tion, from the influence of the President, the majority coalition, and politics directly.2 If justices on the Rehnquist Court are simply instrumental in their decision-making, that is, if they simply follow election returns or their own policy wants or those of the president/ majority coalition that appointed them, and use principles sim ply to support predetermined policy wants, what might we expect from the Rehnquist Court, which consists of so many members who were selected by conservative Republican presi dents? We would expect the Rehnquist Court to reject long-held polity and rights principles and precedents from the Warren and Burger Court eras. Moreover, we would expect few additions to the rights of individuals generally and, most importantly, few additions to the rights of what I will call subordinated groups ? women, homosexuals, and minority races, or perhaps a signifi cant reduction in the rights of members of such groups. We should also expect the Supreme Court to overturn Supreme Court decisions that the presidents and majority coalitions which appointed the members of the Rehnquist Court have opposed in such a public and determined way. If, however, the mature Rehnquist Court follows the constitu tive approach, not election returns, and is not simply instrumen tal in its approach, we would expect it to define new individual rights, to be counter-majoritarian when fundamental polity and rights principles are about to be undermined, and to innovate as they define individual rights and the powers of government.