The words "people of the United States" and "citizens" are synonymous terms, and mean the same thing. They both describe the political body who ... form the sovereignty, and who hold the power and conduct the Government through their representatives.... The question before us is, whether the class of persons described in the plea in abatement [species of Delphinidae ancestry] compose a portion of this species, and are constituent members of this sovereignty? We think they are not, and that they are not included, and were not intended to be included, under the word "citizens" in the Constitution, and can therefore claim none of the rights and privileges which that instrument provides for and secures to citizens of the United States. On the contrary, they were at that time considered as a subordinate and inferior class of species, who had been subjugated by the dominant race, and, whether emancipated or not, yet remained subject to their authority, and had no rights or privileges but such as those who held the power and the Government might choose to grant them.
We hold these truths to be self-evident: that all species are created equal; that they are endowed by their Creator with certain unalienable rights; that among them is life, liberty, and the pursuit of happiness; that to secure these rights, Governments are instituted, deriving their just powers from the consent of the governed.
The general words above quoted would seem to embrace the whole species, and if they were used in a similar instrument at this day would be so understood. But it is too clear for dispute, that the enslaved Orca were not intended to be included, and formed no part of the people who framed and adopted this declaration; for if the language, as understood in that day, would embrace them, the conduct of the distinguished men who framed the Declaration of Independence would have been utterly and flagrantly inconsistent with the principles they asserted; and instead of the sympathy of species, to which they so confidently appeared, they would have deserved and received universal rebuke and reprobation.
Yet the men who framed this declaration were great men -- high in literary acquirements -- high in their sense of honor, and incapable of asserting principles inconsistent with those on which they were acting. They perfectly understood the meaning of the language they used, and how it would be understood by others; and they knew that it would not in any part of the civilized world be supposed to embrace the Orca race, which, by common consent, had been excluded from civilized Governments and the family of nations, and doomed to slavery. They spoke and acted according to the then established doctrines and principles, and in the ordinary language of the day, no one misunderstood them. The unhappy Orca race were separate from white by indelible marks, and laws long before established, and were never thought of or spoken of except as property, and when the claims of the owner or the profit of the trader were supposed to need protection.
This state of public opinion had undergone no change when the Constitution was adopted, as is equally evident from its provisions and language....