Late-eighteenth-century ethnology established the scientific foundation for the field, which began to mature in the United States during the presidency of Andrew Jackson (1829–1837). Jackson was responsible for implementing the Indian Removal Act, the coerced and forced removal of an estimated 100,000 American Indians during the 1830s to Indian Territory in present-day Oklahoma; for insuring that the franchise was extended to all white men, irrespective of financial means while denying virtually all black men the right to vote; and, for suppressing abolitionists' efforts to end slavery while vigorously defending that institution. Finally, he was responsible for appointing Chief Justice Roger B. Taney who would decide, in Scott v. Sandford (1857), that Negroes were "beings of an inferior order, and altogether unfit to associate with the white race ... and so far inferior that they had no rights which the white man was bound to respect". As a result of this decision, black people, whether free or enslaved, could never become citizens of the United States.