In his book "What Women Want, What Men Want", anthropologist John Townsend takes the genetic basis of love one step further by identifying how the sexes are different in their predispositions. Townsend's compilation of various research projects concludes that men are susceptible to youth and beauty, whereas women are susceptible to status and security. These differences are part of a natural selection process where males seek many healthy women of childbearing age to mother offspring, and women seek men who are willing and able to take care of them and their children.