Abstract
As a species, humans are generally serial monogamists; in some cases mating with the same partner for years or even decades. Nonetheless, humans often mate with more than one partner over the life course, meaning that romantic pair bonds often come to an end. Prior research has tentatively suggested that a mental mechanism might exist that facilitates severing the romantic bond between mates. Put differently, because romantic love is a species-typical trait, all members of the human species may come equipped with the mental hardware for both falling in love as well as for ending a relationship. Currently, the evolutionary, cognitive, neurobiological, and genetic underpinnings of human mate ejection have yet to be fully elucidated. We examine each of these factors to illuminate the possible mechanisms that may underpin the human tendency to fall out of love.