Sex Differences in Human mate Preferences: Evolutionary Hypotheses Tested in 37 Cultures  

"…these results… support the hypothesis that males and females have faced different constraints on reproductive success in our evolutionary past. Females appear to have been limited in reproductive success by access to resources for self and offspring. Males appear to have been limited by access to fertile females. These different selection pressures have presumably produced different male and female reproductive strategies. The greater female preference for mates displaying cues to high resource potential and the greater male preference for mates displaying cues to high reproductive capacity appear to represent adaptations to sex-differentiated reproductive constraints in our evolutionary past."--“Sex differences in human mate preferences: Evolutionary hypotheses tested in 37 cultures” (1995) by David Buss