In recent years, many human behaviors have been examined and explained within the context of evolutionary development. For instance, love and affection are believed to function as a way of bringing and keeping two people together for the purposes of procreating and maintaining a family unit. I was thinking about this the other day and wondered if, in intimate relationships, discord, fighting and breakup also have an evolutionary origin and role? After all, recent work in the intersecting fields of evolution, biology and psychology seem to imply that most human behavior is not random, it has a purpose.
Could fighting be a way of dismantling affection and love, prompting us to separate? Compelling us to breed elsewhere, to find a more suitable genetic mate or to simply move on and spread cultural knowledge and memes elsewhere.