Few phrenologists argued against the emancipation of the slaves. Instead they argued that through education and interbreeding the lesser peoples could improve. Another argument was that the natural inequality of people could be used to situate them in the most appropriate place in society. Gender stereotyping was also common with phrenology. Women whose heads were generally larger in the back with lower foreheads were thought to have underdeveloped organs necessary for success in the arts and sciences while having larger mental organs relating to the care of children and religion. While phrenologists did not contend the existence of talented women, this minority did not provide justification for citizenship or participation in politics. One of the considered practical applications of phrenology was education. Due to the nature of phrenology people were naturally considered unequal, as very few people would have a naturally perfect balance between organs. Thus education would play an important role in creating a balance through rigorous exercise of beneficial organs while repressing baser ones. One of the best examples of this is Félix Voisin who for approximately ten years ran a reform school in Issy for the express purpose of correction of the mind of children who had suffered some hardship. Voisin focused on four categories of children for his reform school:  Phrenology was one of the first to bring about the idea of rehabilitation of criminals instead of vindictive punishments that would not stop criminals, only with the reorganizing a disorganized brain would bring about change. Voisin believed along with others the accuracy of phrenology in diagnosing criminal tendencies. Diagnosis could point to the type of offender, the insane, an idiot or brute, and by knowing this an appropriate course of action could be taken. A strict system of reward and punishment, hard work and religious instruction, was thought to be able to correct those who had been abandoned and neglected with little education and moral ground works. Those who were considered mentally challenged could be put to work and housed collectively while only criminals of intellect and vicious intent needed to be confined and isolated. Phrenology also advocated variable prison sentences, the idea being that those who were only defective in education and lacking in morals would soon be released while those who were mentally deficient could be watched and the truly abhorrent criminals would never be released. For other patients phrenology could help redirect impulses, one homicidal individual became a butcher to control his impulses, while another became a military chaplain so he could witness killings. Phrenology also provided reformist arguments for the lunatic asylums of the Victorian era.