We’ve all heard the old saying, “you can pick your friends, you can pick your nose, but you can’t pick your friend’s nose.” But how do we really pick our friends? Is it chance or is there scientific reasoning behind it? This was the question I had while sitting with my best friend, doing our homework and painting our nails.
According to the Smithsonian, scientists have generated evolutionary theories as to why we share genetic similarities with our friends. Animals and early humans stuck together in packs and groups of animals of their same species or clan. They did this to protect one another, and work as a team. Scientists also believe that because of our inherit want to pass our genes down and continue the existence of our species, associating with others that are not related to us helps us to either mate with them ourselves or have our kin mate with them. Scientists drew from this theory the thought that this is why we choose, or do not choose, to be friends with certain people.
However, not all scientists agree- an article by The Carolina Population Center at UNC- Chapel Hill referenced the varying ideas of University of Colorado and Yale University. Researchers at the two schools used data from Add, (The National Longitudinal Study of Adolescent Health) to see the effects genetics have on choosing friendships. Social scientists including Jason Boardman from the University of Colorado took away from their research that the genetic similarities are not on purpose, i.e. correlation does not necessarily mean causation, it is simply social reasons that put us into situations where we meet people we share genes with. Hence it is the exposure, not the genetic similarities, which make us become friends with them. Most residential areas have a fairly homogenous demographic, so it is difficult to draw conclusions in this “what came first, the chicken or the egg?”-type scenario. Clearly there are different ideas as to why we are friends with the friends we have. I think the second theory is more realistic, and the first one is a little outdated with how progressive society is today. I like having friends that are different from me; it is a better learning experience and there is so much more to talk about!
Sources
http://www.cpc.unc.edu/projects/addhealth/news/add-health-study-do-we-really-pick-our-friends-based-on-genetic-similarities
http://blogs.smithsonianmag.com/science/2012/10/do-we-really-pick-our-friends-based-on-genetic-similarities/
http://www.cpc.unc.edu/projects/addhealth
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