the Federal legislature should attempt to vary the law of descent in any state, would it not be evident that, in making such an attempt, it had exceeded its jurisdiction, and infringed upon that of the state? Suppose, again, that upon the pretense of an interference with its revenues, it should undertake to abrogate a land-tax imposed by the authority of a state; would it not be equally evident that this was an invasion of that concurrent jurisdiction in respect to this species of tax, which its Constitution plainly supposes to exist in the state governments? If there ever should be a doubt on this head, the credit of it will be entirely due to those reasoners who, in the imprudent zeal of their animosity to the plan of the convention, have labored to envelop it in a cloud calculated to obscure the plainest and simplest truths.
But it is said that the laws of the Union are to be the supreme law of the land. But what inference can be drawn from this, or what would they amount to, if they were not to be supreme? It is evident they would amount to nothing. A law , by the very meaning of the term, includes supremacy. It is a rule which those to whom it is prescribed are bound to observe. This results from every political association. If individuals enter into a state of society, the laws of that society must be the supreme regulator of their conduct. If a number of political societies enter into a larger political society, the laws which the latter may enact, pursuant to the powers entrusted to it by its constitution, must necessarily be supreme over those societies, and the individuals of whom they are composed. It would otherwise be a mere treaty, dependent on the good faith of the parties, and not a government, which is only another word for political power and supremacy . But it will not follow from this doctrine that acts of the large society which are not pursuant to its constitutional powers, but which are invasions of the residuary authorities of the smaller societies, will become the supreme law of the land. These will be merely acts of usurpation, and will deserve to be treated as such. Hence we perceive that the clause which declares the supremacy of the laws of the Union, like the one we have just before