But until that time arrives, it is undoubtedly necessary that some Government should be established, in order to organize society, and to protect the inhabitants in their persons and property; and as the people of the United States could act in this matter only through the Government which represented them, and through which they spoke and acted when the Territory was obtained, it was not only within the scope of its powers, but it was its duty to pass such laws and establish such a Government as would enable those by whose authority they acted to reap the advantages anticipated from its acquisition, and to gather there a population which would enable it to assume the position to which it was destined among the States of the Union. The power to acquire necessarily carries with it the power to preserve and apply to the purposes for which it was acquired. The form of government to be established necessarily rested in the discretion of Congress. It was their duty to establish the one that would be best suited for the protection and security of the citizens of the United States, and other inhabitants who might be authorized to take up their abode there, and that must always depend upon the existing condition of the Territory, as to the number and character of its inhabitants, and their situation in the Territory. In some cases a Government, consisting of persons appointed by the Federal Government, would best subserve the interests of the Territory, when the inhabitants were few and scattered, and new to one another. In other instances, it would be more advisable to commit the powers of self-government to the people who had settled in the Territory, as being the most competent to determine what was best for their own interests. But some form of civil authority would be absolutely necessary to organize and preserve civilized society, and prepare it to become a State; and what is the best form must always depend on the condition of the Territory at the time, and the choice of the mode must depend upon the exercise of a discretionary power by Congress, acting within the scope of its constitutional authority, and not infringing upon the rights of person or rights of property of the citizen who might go there to reside, or for any other lawful purpose. It was acquired by the exercise of this discretion, and it must be held and governed in like manner, until it is fitted to be a State.