This recent series of posts has used the example of Stephen Colbert’s satirical “March to Keep Fear Alive” as a timely illustration of a larger point: humans evolved to be fearful — a major feature of the brain’s negativity bias that helped our ancestors pass on their genes. Consequently, as much research has shown, we’re usually much more affected by negative — by which I mean painful — experiences than by positive ones.

Besides the personal impacts of this bias in the brain, it also makes people, and nations, vulnerable to being manipulated by threats, both real ones and “paper tigers.” Colbert is mocking those who play on fear, since we surely don’t need more efforts to keep fear alive.

Your Brain on Negative
Painful experiences range from subtle discomfort to extreme anguish — and there is a place for them. Sorrow can open the heart, anger can highlight injustices, fear can alert you to real threats, and remorse can help you take the high road next time.

But is there really any shortage of suffering in this world? Look at the faces of others, or your own, in the mirror, and see the marks of weariness, irritation, stress, disappointment, longing and worry. There’s plenty of challenge in life already — including unavoidable illness, loss of loved ones, old age and death — without needing a bias in your brain to give you an extra dose of pain each day.

Yet as my last post explored, your brain evolved exactly such a “negativity bias” in order to help your ancestors pass on their genes — a bias that produces lots of collateral damage today. [Read more...]