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6 to the proper exercise of the judicial function. “Stare decisis is the preferred course because it promotes the evenhanded, predictable, and consistent development of legal principles, fosters reliance on judicial decisions, and contributes to the actual and perceived integrity of the judicial process.” Payne v. Tennessee, 501 U. S. 808, 827 (1991). For these reasons, we have long recognized that departures from precedent are inappropriate in the absence of a “special justification.” Arizona v. Rumsey, 467 U. S. 203, 212 (1984).

At the same time, stare decisis is neither an “inexorable command,” Lawrence v. Texas, 539 U. S. 558, 577 (2003), nor “a mechanical formula of adherence to the latest decision,” Helvering v. Hallock, 309 U. S. 106, 119 (1940), especially in constitutional cases, see United States v. Scott, 437 U. S. 82, 101 (1978). If it were, segregation would be legal, minimum wage laws would be unconstituional, and the Government could wiretap ordinary criminal suspects without first obtaining warrants. See Plessy v. Ferguson, 163 U. S. 537 (1896), overruled by Brown v. Board of Education, 347 U. S. 483 (1954); Adkins v. Children’s Hospital of D. C., 261 U. S. 525 (1923), overruled by West Coast Hotel Co. v. Parrish, 300 U. S. 379 (1937); Olmstead v. United States, 277 U. S. 438 (1928), overruled by Katz v. United States, 389 U. S. 347 (1967). As the dissent properly notes, none of us has viewed stare decisis in such absolute terms. Post, at 17; see also, e.g., Randall v. Sorrell, 548 U. S. 230, 274–281 (2006) (, J., dissenting) (urging the Court to overrule its invalidation of limits on independent expenditures on political speech in Buckley v. Valeo, 424 U. S. 1 (1976) (per curiam)).

Stare decisis is instead a “principle of policy.” Helvering, supra, at 119. When considering whether to reexamine a prior erroneous holding, we must balance the importance of having constitutional questions decided against the importance of having them decided right. As Justice