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. It was in this context that the so-called American School of Anthropology thrived as the champion of polygenism or the doctrine of multiple origins—sparking a debate between those influenced by the Bible who believed in the unity of humanity and those who argued from a scientific standpoint for the plurality of origins and the antiquity of distinct types. Like the monogenists, these theories were not monolithic and often used words like races, species, hybrid, and mongrel interchangeably. A scientific consensus began to emerge during this period "that there exists a Genus Homo, embracing many primordial types of 'species'". Charles Caldwell, Samuel George Morton, Samuel A. Cartwright, George Gliddon, Josiah C. Nott, and Louis Agassiz, and even South Carolina Governor James Henry Hammond were all influential proponents of this school. While some were disinterested scientists, others were passionate advocates who used science to promote slavery in a period of increasing sectional strife. All were complicit in establishing the putative science that justified slavery, informed the Dred Scott decision, underpinned miscegenation laws, and eventually fueled Jim Crow. Samuel G. Morton, for example, claimed to be just a scientist but he did not hesitate to provide evidence of Negro inferiority to John C. Calhoun, the prominent pro-slavery Secretary of State to help him negotiate the annexation of Texas as a slave state. The high-water mark of polygenic theories was Josiah Nott and Gliddon's voluminous eight-hundred page tome titled Types of Mankind, published in 1854. Reproducing the work