As a 4th of July observance, I would like to quote a passage from Book I, Chapter V of Knickerbocker’s History of New York:

…Here then are three complete and undeniable sources of right established, any one of which was more than ample to establish a property in the newly-discovered regions of America. Now, so it has happened in certain parts of this delightful quarter of the globe that the right of discovery has been so strenuously asserted—the influence of cultivation so industriously extended, and the progress of salvation and civilization so zealously persecuted; that, what with their attendant wars, persecutions, oppressions, diseases, and other partial evils that often hang on the skirts of great benefits—the savage aborigines have, somehow or other, been utterly annihilated—and this all at once brings me to a fourth right, which is worth all the others put together. For the original claimants to the soil being all dead and buried, and no one remaining to inherit or dispute the soil, the Spaniards, as the next immediate occupants, entered upon the possession as clearly as the hangman succeeds to the clothes of the malefactor—and as they have Blackstone[21] and all the learned expounders of the law on their side, they may set all actions of ejectment at defiance—and this last right may be entitled the right by extermination, or in other words, the right by gunpowder.

But lest any scruples of conscience should remain on this head, and to settle the question of right for ever, his holiness Pope Alexander VI. issued a mighty Bull, by which he generously granted the newly-discovered quarter of the globe to the Spaniards and Portuguese; who, thus having law and gospel on their side, and being inflamed with great spiritual zeal, showed the pagan savages neither favor nor affection, but persecuted the work of discovery, colonization, civilization, and extermination with ten times more fury than ever.

Thus were the European worthies who first discovered America clearly entitled to the soil, and not only entitled to the soil, but likewise to the eternal thanks of these infidel savages, for having come so far, endured so many perils by sea and land, and taken such unwearied pains, for no other purpose but to improve their forlorn, uncivilized, and heathenish condition; for having made them acquainted with the comforts of life; for having introduced among them the light of religion; and, finally, for having hurried them out of the world to enjoy its reward!

Irving settles the question, once and for all, of colonist rights of possession by placing them in the position of savages with respect to explorers from the moon:

…At these words, the great Man in the Moon (being a very profound philosopher) shall fall into a terrible passion, and possessing equal authority over things that do not belong to him, as did whilome his holiness the Pope, shall forthwith issue a formidable Bull, specifying, "That whereas a certain crew of Lunatics have lately discovered and taken possession of a newly-discovered planet called the earth; and that whereas it is inhabited by none but a race of two-legged animals that carry their heads on their shoulders instead of under their arms; cannot talk the Lunatic language; have two eyes instead of one; are destitute of tails, and of a horrible whiteness, instead of pea-green—therefore, and for a variety of other excellent reasons, they are considered incapable of possessing any property in the planet they infest, and the right and title to it are confirmed to its original discoverers. And, furthermore, the colonists who are now about to depart to the aforesaid planet are authorised and commanded to use every means to convert these infidel savages from the darkness of Christianity, and make them thorough and absolute Lunatics."

In consequence of this benevolent Bull, our philosophic benefactors go to work with hearty zeal. They seize upon our fertile territories, scourge us from our rightful possessions, relieve us from our wives, and when we are unreasonable enough to complain, they will turn upon us and say, "Miserable barbarians! ungrateful wretches! have we not come thousands of miles to improve your worthless planet? have we not fed you with moonshine! have we not intoxicated you with nitrous oxide? does not our moon give you light every night? and have you the baseness to murmur, when we claim a pitiful return for all these benefits?" But finding that we not only persist in absolute contempt of their reasoning and disbelief in their philosophy, but even go so far as daringly to defend our property, their patience shall be exhausted, and they shall resort to their superior powers of argument; hunt us with hippogriffs, transfix us with concentrated sunbeams, demolish our cities with moonstones; until having by main force converted us to the true faith, they shall graciously permit us to exist in the torrid deserts of Arabia, or the frozen regions of Lapland, there to enjoy the blessings of civilization and the charms of lunar philosophy, in much the same manner as the reformed and enlightened savages of this country are kindly suffered to inhabit the inhospitable forests of the north, or the impenetrable wilderness of South America.

It was indeed a given in the row between the colonists and England that the welfare of the people who greeted them when they first arrived in the new world was not a consideration. In the Declaration of Independence, there was nary a peep about the native inhabitants.