Physiological and biological theories have argued that some individuals genetically tend to be more prone to deviance than others. The first work in this sense was provided in 1870 by Cesare Lombroso, an Italian criminologist (1835-1909), who suggested that the types of criminals could be detected by certain anatomical features. Lombroso, who made analyses at prisons, suggests that the criminals resemble humans’ ape-like ancestors. Lombroso examined the physical properties of criminals such as skull and forehead shape, jaw size and limb length, and suggested that they exhibit features from earlier stages of human evolution and that they return to primitive forms of humanity.