for the regulation of commerce, namely: that which a State cannot invade, that which the State may invade, when Congress has not interfered, and that which is reserved to the State in conformity with its police power. But as late as 1886 the nationalistic school found some encouragement in the decision of the Wabash, St. Louis and Pacific Railway Company v. Illinois30 given by Justice Miller. He said: "Notwithstanding what is there said, that is, in the decisions of Munn v. Illinois; C. B. and Q. R. R. Company v. Iowa, and Peik v. Chicago and N. W. R. R. Co.,31 this court held and asserted that it had never consciously held otherwise, that a statute of a State intended to regulate or to tax, or to impose any other restriction upon the transmission of persons or property or telegraphic messages, from one State to another, is not within the class of legislation which the States may enact in the absence of legislation by Congress; and that such statutes are void even as to the part of such transmission which may be within the State." Chief Justice Waite, and Justice Bradley and Justice Gray, however, dissented for various reasons.
In the Louisville Railway Company v. Mississippi,32 however, in 1899, the court, evidently yielding to southern public opinion, reversed itself by the decision that an interstate carrier could not run a train through Mississippi without attaching thereto a separate car for Negroes and had the audacity to argue that this is not an interference with interstate commerce.33 To show how inconsistent this interpretation was one should bear in mind that in Hall v. DeCuir the court had held that this was exactly what a State could not do in that the statute acted not upon business through local instruments to be employed after coming into the State, but directly upon business as it comes into the State from without or goes out from within, although it purported only to control the carrier when engaged within the State. It necessarily influenced the conduct of the carrier to some extent in the management of his business throughout his entire voyage. "No carrier of passengers," said the court in Hall v. DeCuir, "can conduct his business with satisfaction to himself, or comfort to those employing him, if on one side of a State line his passengers, both white and colored, must be permitted to occupy the same cabin, and on the other to be kept separate. Uniformity in the regulation by which he is to be governed from one end to the other of his route is a necessity in his business, and to secure it, Congress, which is untrammelled by State lines, has been invested with exclusive legislative power of determining what such regulation should be."
Giving the opinion in the Mississippi case, however, Justice Brewer said: "It has been often held by this court that there is a commerce wholly within the State which is not subject to the constitutional provision and the distinctions between commerce among the States and the other class of commerce between citizens of a single State and conducted within its limits exclusively is one which has been fully recognized in this court, although it may not be always easy, where the lines of these classes approach each other, to distinguish between the one and the other."34 He might have added some other comment to the effect that this court will not definitely draw the line of distinction between such classes of commerce since it desires to leave adequate room for evasion, because it had been unusually easy to find such a line in cases in which the rights of Negroes were concerned and such definite interpretation might interfere with the rights of white men. Justices Harlan and Bradley dissented on the grounds that the law imposed a burden upon an interstate carrier in that he would be fined if he did not attach an additional car for race discrimination, and that the opinion was repugnant to the principles set forth in that of Hall v. DeCuir.
The United States Supreme Court finally reached the position of following the decision of Ex Parte Plessy which justified the discrimination in railway cars on the grounds that it is not a badge of slavery contrary to the Thirteenth Amendment. This decision, in short, is: So long, at least, as the facilities or accommodations provided are substantially equal, statutes providing separate cars for the races do not abridge any privilege or immunity of citizens or otherwise contravene the Fourteenth Amendment of the United States Constitution. In such matters equality and not identity or community of accommodations is the extreme test of conformity to the requirements of the amendment. The regulation of domestic commerce is as exclusively a State function as the regulation of interstate commerce is a Federal function. The separate car law is an exercise of police power in the interest of public order, peace and comfort. It is a matter of legislative power and discretion with which Federal courts cannot interfere.
In Hennington v. Georgia,35 it was later emphasized that it had been held that legislative enactments of the States, passed under the admitted police powers, and having a real relation to the domestic peace, order, health, and safety of their people, but which by their necessary operation, affect, to some extent, or for a limited time, the conduct of commerce among the States, are yet not invalid by force alone of the grant of power of Congress to regulate such commerce; and, if not obnoxious to some other constitutional provision or destructive of some right secured by the fundamental law, are to be respected in the courts of the Union until they are superseded and displaced by some act of Congress passed in execution of power granted to it by the Constitution. Of course, there was no other provision to which such laws could be contrary after the Supreme Court had whittled away the war amendments.
In the case of Plessy v. Ferguson36 the most inexcusable inconsistency of the court was shown when the persons of color aggrieved attacked the separate car law of Louisiana on the ground that it conflicted with the Fourteenth Amendment. Giving the opinion of the court, Justice Brown said: "So far, then, as a conflict with the Fourteenth Amendment is concerned, the case reduces itself to the question whether the statute of Louisiana is a reasonable regulation, and with respect to this there must necessarily be a large discretion on the part of the legislature. In determining the question of reasonableness it is at liberty to act with reference to the established usages, customs and traditions of the people, and with a view to the promotion of the public peace and good order. Gauged by this standard, we cannot say that a law which authorizes or even requires the separation of the two races in public conveyances is unreasonable, or more obnoxious to the Fourteenth Amendment than the acts of Congress requiring separate schools for colored children in the District of Columbia, the constitutionality of which does not seem to have been questioned or the corresponding acts of State legislatures."
Justice Harlan dissented, saying that he was of the opinion that the Statute of Louisiana is inconsistent with personal liberty of white and black in that State and hostile to both in the letter and spirit of the Constitution of the United States. Justice Harlan rightly contended that laws can have no regard to race according to the Constitution. If they do, they conflict with the rights of State and national citizenship and with personal liberty. The Thirteenth and Fourteenth Amendments removed race from our governmental system. But what has the court to do with the policy or expediency of legislation? "A statute may be valid, and yet upon grounds of public policy, may well be characterized as unreasonable." Accordingly Mr. Sedgwick, a distinguished authority, says: "The Courts have no other duty to perform than to execute the legislative will, without regard to their views as to the wisdom or justice of the particular enactment." "Statutes," said Justice Harlan, "must always have a reasonable construction. Sometimes they are to be construed strictly; sometimes, liberally, in order to carry out the legislative will. But, however construed, the intent of the legislature is to be respected."
The decisions in the cases of M. K. and T. Railway v. Haber37 and Crutcher v. Kentucky,38 are of some importance. In these cases the court reiterated the doctrine that the regulation of the enjoyment of the relative rights and the performance of the duties, of all persons within the jurisdiction of a State belong primarily to such a State under its reserved power to provide for the safety of all persons and property within its limits; and that even if the subject of such regulations be one that may be taken under the exclusive control of Congress, and be reached by national legislation, any action taken by the State upon that subject that does