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Rick Hanson, Ph.D.Rick Hanson, Ph.D.
Just One Thing - suggests a simple practice each week that will bring you more joy, more fulfilling relationships, and more peace of mind and heart.

How Did Humans Become Empathetic?

Rick Hanson, Ph.D. Updated: Aug 22nd 2011

Empathy is unusual in the animal kingdom. So empathy must have had some major survival benefits for it to have evolved. What might those benefits have been?

young and old hands held togetherEmpathy seems to have evolved in three major steps.

First, among vertebrates, birds and mammals developed ways of rearing their young, plus forms of pair bonding - sometimes for life. This is very different from the pattern among fish and reptile species, most of which make their way in life alone. Pair bonding and rearing of young organisms increased their survival and was consequently selected for, driving the development of new mental capacities.

As neuroscientists put it, the "computational requirements" of tuning into the signals of newborn little creatures, and of operating as a couple - a sparrow couple, a mountain lion couple, that is - helped drive the enlargement of the brain over millions of years. As we all know, when you are in a relationship with someone - and especially if you are raising a family together - there's a lot you have to take into account, negotiate, arrange, anticipate, etc. No wonder brains got bigger.

It may be a source of satisfaction to some that monogamous species typically have the largest brains in proportion to bodyweight!

Second, building on this initial jump in brain size, among primate species, the larger and more complex the social group, the bigger the brain. (And the key word here is social, since group size alone doesn't create a big brain; if it did, cattle would be geniuses.)

In other words, the "computational requirements" of dealing with lots of individuals - the alliances, the adversaries, all the politics! - in a baboon or ape band also pushed the evolution of the brain.

Third, living in small bands in harsh conditions in Africa, and breeding mainly within their own band, our hominid and early human ancestors were under intense evolutionary pressures to develop strong teamwork as a band while they competed fiercely - and often lethally - with other bands for scarce resources. Hominids starting making stone tools about 2.5 million years ago, and during the 100,000 generations since, the brain has tripled in size; much of that new neural volume is used for interpersonal capacities such as empathy, language, cooperative planning, altruism, parent-child attachment, social cognition, and the construction of the personal self in relationships.

In sum: More than learning how to use tools, more than being successful at violence, more than adapting to moving out of the forest into the grasslands of Africa, it was the complexities of relationships that drove human evolution!

Homo sapiens means clever ape. We are clever to be sure, but we are clever in order to relate. It would be perhaps more accurate to call our species Homo sociabilis, the sociable ape.

As Charles Darwin wrote: "All sentient beings developed through natural selection in such a way that pleasant sensations serve as their guide, and especially the pleasure derived from sociability and from loving our families."

Sociability, and the empathy at the heart of it, drove evolution - in a fundamental sense, it is empathy that has enabled this blog to be posted by me and read by you.

Empathy is in our bones. For example, infants will cry at the tape-recorded sound of other infants crying but not at a recording of their own cries. And speaking of crying, as adults, our tear glands will automatically start producing tears when we hear the crying of others, even if we have no sense of tearing up ourselves.

Perhaps an even better name for ourselves would be Homo empathicus.

 

Rick Hanson, Ph.D.

Rick Hanson, Ph.D., is a neuropsychologist and New York Times best-selling author. His books include Hardwiring Happiness: The New Brain Science of Contentment, Calm, and Confidence (in 12 languages), Buddha’s Brain: The Practical Neuroscience of Happiness, Love, and Wisdom (in 25 languages), Just One Thing: Developing a Buddha Brain One Simple Practice at a Time (in 13 languages), and Mother Nurture: A Mother’s Guide to Health in Body, Mind, and Intimate Relationships. Founder of the Wellspring Institute for Neuroscience and Contemplative Wisdom and on the Advisory Board of the Greater Good Science Center at UC Berkeley, he’s been an invited speaker at Oxford, Stanford, and Harvard, and taught in meditation centers worldwide. A summa cum laude graduate of UCLA, his work has been featured on the BBC, NPR, CBC, FoxBusiness, Consumer Reports Health, U.S. News and World Report, and O Magazine and he has several audio programs with Sounds True. His weekly e-newsletter – Just One Thing – has over 100,000 subscribers, and also appears on Huffington Post, Psychology Today, and other major websites. For more information, please see his full profile at www.RickHanson.net.

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