This article integrates the findings of a series of studies that empirically address contentions that many “normal” men possess a proclivity to rape. In these studies, an attempt was made to identify individuals with such a proclivity by asking male college students how likely they personally would be to rape if they could be assured of not being caught. On the average, about 35% indicated some likelihood of raping. To assess the validity of such reports as indicators of a proclivity to rape, the following three steps were taken: First, the literature was reviewed to identify responses that distinguished convicted rapists from the general population. The responses found to characterize rapists were greater acceptance of rape myths and relatively high sexual arousal to rape depictions. Second, the relationships between reported likelihood of raping and the responses found to characterize rapists were analyzed. The data clearly showed that in comparison with men who reported lower likelihood of raping, men who indicated higher likelihood were more similar to convicted rapists both in beliefs in rape myths and in sexual arousal to rape depictions. Third, the relationship between likelihood of raping reports and aggressive behavior was examined. It was found that higher reported likelihood of raping was associated with greater aggression against women within a laboratory setting. The overall pattern of the data is interpreted as supporting the validity of likelihood of raping ratings and consistent with contentions that many men have a proclivity to rape. Possible causes of such a propensity and directions for future research are discussed.