The questions thus presented are not questions of constitutional right but of legislative policy, which must be formulated, not _in vacuo_ or with doctrinaire disregard of existing conditions, but in realistic approach to the situations to which it is to be applied.... The Federal courts would be going far outside their constitutional function were they to attempt to prescribe educational policies for the States in such matters, however desirable such policies might be in the opinion of some sociologists or educators. For the Federal courts to do so would result, not only in interference with local affairs by an agency of the Federal government, but also in the substitution of the judicial for the legislative process in what is essentially a legislative matter. The public schools are facilities provided and paid for by the States. The State’s regulation of the facilities which it furnishes is not to be interfered with unless constitutional rights are clearly infringed. There is nothing in the Constitution that requires that a State grant to all members of the public a common right to use every facility that it affords.... The equal protection of the laws does not mean that the child must be treated as the property of the State and the wishes of his family as to his upbringing be disregarded. In oral argument of the case, Thurgood Marshall had urged the trial court to create judicial history by abandoning, on its own motion, the precedents of many years in support of “separate but equal.” Judges Parker and Timmerman were not willing to do so. These unreversed decisions, they said, were squarely in point and conclusive. If this long line of cases were to be overturned or held outmoded, the Supreme Court itself would have to take that step. And Parker concluded: