The plaintiffs in this cause claim the land, in their declaration mentioned, under two grants, purporting to be made, the first in 1773, and the last in 1775, by the chiefs of certain Indian tribes, constituting the Illinois and the Piankeshaw nations; and the question is, whether this title can be recognised in the Courts of the United States?

The facts, as stated in the case agreed, show the authority of the chiefs who executed this conveyance, so far as it could be given by their own people; and likewise show, that the particular tribes for whom these chiefs acted were in rightful possession of the land they sold. The inquiry, therefore, is, in a great measure, confined to the power of Indians to give, and of private individuals to receive, a title which can be sustained in the Courts of this country.

Johnson v. M'Intosh/Opinion of the Court

As the right of society, to prescribe those rules by which property may be acquired and preserved is not, and cannot be drawn into question; as the title to lands, especially, is and must be admitted to depend entirely on the law of the nation in which they lie; it will be necessary, in pursuing this inquiry, to examine, not singly those principles of abstract justice, which the Creator of all things has impressed on the mind of his creature man, and which are admitted to regulate, in a great degree, the rights of civilized nations, whose perfect independence is acknowledged; but those principles also which our own government has adopted in the particular case, and given us as the rule for our decision.

Johnson v. M'Intosh/Opinion of the Court

On the discovery of this immense continent, the great nations of Europe were eager to appropriate to themselves so much of it as they could respectively acquire. Its vast extent offered an ample field to the ambition and enterprise of all; and the character and religion of its inhabitants afforded an apology for considering them as a people over whom the superior genius of Europe might claim an ascendency. The potentates of the old world found no difficulty in convincing themselves that they made ample compensation to the inhabitants of the new, by bestowing on them civilization and Christianity, in exchange for unlimited independence. But, as they were all in pursuit of nearly the same object, it was necessary, in order to avoid conflicting settlements, and consequent war with each other, to establish a principle, which all should acknowledge as the law by which the right of acquisition, which they all asserted, should be regulated as between themselves. This principle was, that discovery gave title to the government by whose subjects, or by whose authority, it was made, against all other European governments, which title might be consummated by possession.

Johnson v. M'Intosh/Opinion of the Court

The exclusion of all other Europeans, necessarily gave to the nation making the discovery the sole right of acquiring the soil from the natives, and establishing settlements upon it. It was a right with which no Europeans could interfere. It was a right which all asserted for themselves, and to the assertion of which, by others, all assented.

Those relations which were to exist between the discoverer and the natives, were to be regulated by themselves. The rights thus acquired being exclusive, no other power could interpose between them.

In the establishment of these relations, the rights of the original inhabitants were, in no instance, entirely disregarded; but were necessarily, to a considerable extent, impaired. They were admitted to be the rightful occupants of the soil, with a legal as well as just claim to retain possession of it, and to use it according to their own discretion; but their rights to complete sovereignty, as independent nations, were necessarily diminished, and their power to dispose of the soil at their own will, to whomsoever they pleased, was denied by the original fundamental principle, that discovery gave exclusive title to those who made it.

While the different nations of Europe respected the right of the natives, as occupants, they asserted the ultimate dominion to be in themselves; and claimed and exercised, as a consequence of this ultimate dominion, a power to grant the soil, while yet in possession of the natives. These grants have been understood by all, to convey a title to the grantees, subject only to the Indian right of occupancy.

The history of America, from its discovery to the present day, proves, we think, the universal recognition of these principles.

Spain did not rest her title solely on the grant of the Pope. Her discussions respecting boundary, with France, with Great Britain, and with the United States, all show that she placed in on the rights given by discovery. Portugal sustained her claim to the Brazils by the same title.