Summary

by John Marshall Harlan Connolly v. Union Sewer Pipe Company…

We must not be understood by what has been said as conceding that the question of a denial of the equal protection of the laws can never arise under the taxing statutes of a state. On the contrary, the power to tax is so far limited that it cannot be used to impair or destroy rights that are given or secured by the supreme law of the land. We only need to say, in this connection, that the constitutional validity of the statute of Illinois now before us is not necessarily to be determined by the same principles that apply to taxing laws.
Source: Wikisource

by John Marshall Harlan Connolly v. Union Sewer Pipe Company…

Classification, therefore, is necessary, but what are its limits? They are not easily defined, but the purview of the legislation should be regarded. A line must not be drawn which includes arbitrarily some persons who do and some persons who do not stand in the same relation to the purpose of the legislation. But a wide latitude of selection must be left to the legislature. It is only a palpable abuse of the power of selection which can be judicially reviewed, and the right of review is so delicate that even in its best exercises it may lead to challenge.
Source: Wikisource

by John Marshall Harlan Connolly v. Union Sewer Pipe Company…

And when a statute is assailed as denying the equal protection of the laws, its equal operation is only involved.
The principle of classification, therefore, is not different in tax laws than in other laws. That principle, as I have said, necessarily implies discrimination between the persons composing the class and other persons. The equality prescribed by the Constitution is fulfilled if equality be observed between the members of the class.
Source: Wikisource

Get perspective with Kwize: daily news enlightened by great literature