The historian Henry Adams described power as “a sort of tumor that ends by killing the victim’s sympathies.” This may sound like hyperbole, but it has been borne out by years of lab and field experiments. Dacher Keltner, a psychology professor at UC Berkeley, has been studying the influence of power on individuals. He puts people in positions of power relative to each other in different settings. He has consistently found that power, over time, makes one more impulsive, more reckless and less able to see things from others’ points of view. It also leads one to be rude, more likely to cheat on one’s spouse, less attentive to other people, and less interested in the experiences of others.

Does that sound familiar? It turns out that power actually gives you brain damage.

This even shows up in brain scans. Sukhvinder Obhi, a neuroscientist at McMaster University in Ontario, recently examined the brain patterns of the powerful and the not so powerful in a transcranial-magnetic-stimulation machine. He found that those with power are impaired in a specific neural process — mirroring — that leads to empathy.

I’m a parent, and one thing you find very consistently with kids is that they reciprocate what you do. You smile, they smile. You laugh, they laugh. Among the powerful in various settings, their impulse to reflect what they are being shown emotionally has been numbed. They similarly lose the ability to put themselves in another person’s shoes.