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Essay on Altruism

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Why do we show altruism? Social and evolutionary biologists, psychologists, economists and philosophers alike have made many attempts at providing an explanation for altruism. As a result, many opposing theories have developed over the years. In this essay, I will attempt to explain altruism as the presence of an altruistic gene which is selected for by natural selection in terms of kin selection. I will explore evidence supporting this theory, as well as evidence pointing to psychological explanations such as reciprocal altruism, social norms and primitive sympathy.

First, it is important to understand what altruism is. Altruism is any act carried out by an individual in order to benefit another individual. [1, 2] At first glance, …show more content…

Nevertheless, one recent study suggests that genetic differences between our ancestors could have resulted in lethal intergroup competition which disfavoured non-altruists [6]. I will attempt to link this theory to what is known as kin selection. Kin selection explains altruism as an act increasing the probability of an individual’s genes being transmitted to the next generation. [3] We share half of our genes our siblings and parents, and a quarter with cousins, nephews and nieces. [1, 2] Therefore, altruistic behaviour towards these individuals would result in our genes passing on due to their higher probability of survival. This is known as increasing one’s inclusive fitness. [7] Since early human societies included members genetically related to one another, [6] kin selection between these individuals resulted in the societies growing in size. Thus, societies genetically predisposed in displaying co-operative, altruistic behaviour towards each other (through acts such as group hunting, mutually defending each other, and sharing food) are more capable of surviving, resulting in the altruistic gene surviving.[1] This, I believe, is the predominant explanation for altruism in humans today. The act of altruism is a genetic inheritance evolving through the basic instinct of survival and continuity of species.

Other theorists however,

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