The student of history must observe however that that doctrine had been very greatly impaired if not indeed set aside by the act of Virginia in ceding her claims in the Northwest Territory and the acceptance of that cession by the general government. In that cession it had been stipulated that slavery should never be permitted in any of the territory thus made a part of the national domain. The cession was made with the direct intent that the region concerned should presently be divided and admitted into the Union as a number of states. But those states were thus forbidden in advance to permit the existence of slavery within their borders. So far as they were concerned, therefore, the supposed right of a state to legislate at will on that subject was taken away from them even before their birth. Here it would seem there was an abrogation or at least an important modification of the doctrine of the right of each state to determine this question for itself, and that modification had been made by Virginia and everywhere accepted. The Missouri Compromise in precisely the same manner had taken away that right of determination from all the states that might be formed out of the Louisiana territory lying north of the southern line of Missouri. If the prohibition thus laid upon yet unborn states was permissible as regards the cession of the Northwest Territory it would seem to have been equally so with regard to the new domain west of the Mississippi. Further than this the sovereign right of a state to determine this question for itself did not extend at any time to the territories. Under the Constitution as uniformly interpreted by the Supreme Court of the United States, Congress is supreme in the territories and may make any law that it pleases for their governance. In other words the people of the territories have absolutely no rights of self-government except such as Congress may from time to time see fit to confer upon them. This statement is not made speculatively or as an opinion of the historian. It is a well settled doctrine of constitutional law, affirmed by every court to which the question has at any time been submitted. Senator Douglas's Kansas-Nebraska Bill was based upon an assumption precisely the reverse of this. It extended to the territories a sovereignty which under the Constitution belonged only to states, and which, as has been suggested, the states themselves had in a large degree surrendered by the acceptance of the cession of the Northwest Territory. CHAPTER VIII THE KANSAS WAR--THE DRED SCOTT DECISION--JOHN BROWN'S EXPLOIT AT HARPER'S FERRY With the aid of a considerable Northern vote in Congress the South succeeded in passing the Kansas-Nebraska Bill, repealing the Missouri Compromise, and under the doctrine of "Squatter Sovereignty" throwing all the territories open to slavery at least as a possibility.