Love is a little word with a universe of meanings and has engaged people's interest throughout human history. The need to give and receive love lies deep within human nature. Philosophers, poets, theologians, sociologists, and scientists have all attempted to explain its exact origin, but is it an evolutionary adaptation, or a social construct?

Walsh discusses that the nature of and need for love has biological origins. He draws upon Darwin's sexual selection theory to define the perceptions of love by infants through the process of experience-dependent brain wiring. He observes that...