Hereditable traits are reproductively “adaptive” (advantageous), “maladaptive” (disadvantageous), or “neural” (Jones, 1999). Rooted in neo-Darwinian theories of evolution, these theories state that genes dictate that reproduction is the most vital function of an organism, and that DNA codes for priority reproduction must take in order for a species to survive (Fishbein, 2001). Reproduction is a genetically driven evolutionary process that codes for anatomical and physiological traits. Criminal behavior, like all behaviors, revolves around reproductive drives. Proposed evolutionary theories relevant to antisocial and criminal behavior include the r/K theory, the cheater theory, the adaptation hypothesis, and evolutionary theories of rape. All attempt to explain criminal behavior in terms of its long-term reproductive consequences. Heritability studies (involving twin and adoption studies) suggest that personality factors and traits linked to aggressive and violent behavior, may be heritable. Findings suggest that childhood aggression, disruptive behavior, and aggressive behavior across the life course may be mediated by genetic factors (Mik et al., 2007). Some research suggests that aggressiveness is transmitted across generations within families (Huesmann, Enron, & Lefkowitz, 1984) and that alcoholism, susceptibility to aggressive and impulsive behaviors, and personality disorders including conduct disorder, borderline personality disorder, attention deficit disorder, and antisocial personality disorder are genetically influenced (Fishbein, 2001). Studies have found that children who have mothers with histrionic personality disorder (HPD) and fathers with antisocial personality disorder (APD) are more likely to have the disorders themselves (histrionic personality disorder if female and antisocial personality disorder if male) and that HPD and APD are sex-types manifestations of psychopathy (Spalt, 1980; Warner, 1978). However, heredity studies do not identify the genetically influences biological mechanisms that may contribute to these traits (Fishbein, 2001), which may be identified in the future through the discovery of the human genome sequence.