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E-book Hidden Depths : The Origins of Human Connection
Sometimes animals surprise us by doing something that seems uncannily human-like.Marmosets (South American monkeys of the family Callitrichidae) are tiny, weighing only around 300–400g, and though they are primates they look entirely unlike humans, perhaps even a little more like squirrels. However, like humans they form pair bonds, and collaborate in childcare (Figure 1.1). Moreover, experimental research has shown that, given a chance to help others to reach a food treat, even if they know they do not get one them-selves, marmosets will commonly put a lever to get food for others (Burkart et al. 2007). They will even resist the temptation to eat food whilst they wait for others to arrive to share. Such a strength of emotional connection, seen through apparent acts of compassion or generosity, seems to resonate with our own feelings towards those we care about. However, seeing this kind of altruism outside of our own species can raise more questions than answers. Willing generosity to others in their group, and a response to their distress or needs, occurs in many species unrelated to humans, whilst those nearest to us are not neces-sarily the most altruistic. Whilst our nearest relatives, chimpanzees (mem-bers of the genus Pan, including common chimpanzees, Pan troglodytes, and bonobos, Pan paniscus), are without doubt the most socially intelligent of other animal species, they are not the most like humans in terms of gen-erosity and compassion. Tiny marmosets are far more likely to be generous to others. Moreover, entirely unrelated mammals such as lions or wolves seem most similar to ourselves in their tendencies to take risks on others’ behalves, care for each other or share food.What can we learn from other animals about the biology of human generos-ity and compassion? What types of selection pressures may have led to the emergence of our own capacities to be compassionate or generous?
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