Mr. Justice JACKSON, concurring.
There are two clauses of the Fourteenth Amendment which this Court may invoke to invalidate ordinances by which municipal governments seek to solve their local problems. One says that no state shall 'deprive any person of life, liberty, or property, without due process of law'. The other declares that no state shall 'deny to any person within its jurisdiction the equal protection of the laws.'
My philosophy as to the relative readiness with which we should resort to these two clauses is almost diametrically opposed to the philosophy which prevails on this Court. While claims of denial of equal protection are frequently asserted, they are rarely sustained. But the Court frequently uses the due process clause to strike down measures taken by municipalities to deal with activities in their streets and public places which the local authorities consider to create hazards, annoyances or discomforts to their inhabitants. And I have frequently dissented when I thought local power was improperly denied. See, for example, opinion in Douglas v. City of Jeannette and companion cases, 319 U.S. 157, 166, 63 S.Ct. 877, 882, 87 L.Ed. 1324; and dissents in Saia v. People of State of New York, 334 U.S. 558, 566, 68 S.Ct. 1148; Prince v. Commonwealth of Massachusetts, 321 U.S. 158, 176, 64 S.Ct. 438, 447, 88 L.Ed. 645.
The burden should rest heavily upon one who would persuade us to use the due process clause to strike down a substantive law or ordinance. Even its provident use against municipal regulations frequently disables all government-state, municipal and federal from dealing with the conduct in question because the requirement of due process is also applicable to State and Federal Governments. Invalidation of a statute or an ordinance on due process grounds leaves ungoverned and ungovernable conduct which many people find objectionable.
Invocation of the equal protection clause, on the other hand, does not disable any governmental body from dealing with the subject at hand. It merely means that the prohibition or regulation must have a broader impact. I regard it as a salutary doctrine that cities, states and the Federal Government must exercise their powers so as not to discriminate between their inhabitants except upon some reasonable differentiation fairly related to the object of regulation. This equality is not merely abstract justice. The framers of the Constitution knew, and we should not forget today, hat there is no more effective practical guaranty against arbitrary and unreasonable government than to require that the principles of law which officials would impose upon a minority must be imposed generally. Conversely, nothing opens the door to arbitrary action so effectively as to allow those officials to pick and choose only a few to whom they will apply legislation and thus to escape the political retribution that might be visited upon them if larger numbers were affected. Courts can take no better measure to assure that laws will be just than to require that laws be equal in operation.
This case affords an illustration. Even casual observations from the sidewalks of New York will show that an ordinance which would forbid all advertising on vehicles would run into conflict with many interests, including some, if not all, of the great metropolitan newspapers, which use that advertising extensively. Their blandishment of the latest sensations is not less a cause of diverted attention and traffic hazard than the commonplace cigarette advertisement which this truck-owner is forbidden to display. But any regulation applicable to all such advertising would require much clearer justification in local conditions to enable its enactment than does some regulation applicable to a few. I do not mention this to criticize the motives of those who enacted this ordinance, but it dramatizes the point that we are much more likely to find arbitrariness in the regulation of the few than of the many. Hence, for my part, I am more receptive to attack on local ordinances for denial of equal protection than for denial of due process, while the Court has more often used the latter clause.