Will Chesney describes how losing friends in combat hardened his heart: “There was a lot of hate. I just stopped caring. Nobody was worth losing any more of my friends over.” He stopped handing chem lights to kids, stopped caring if civilians died. He’s glad he wasn’t put in certain positions because “it’s not the right call” — you need empathy to be a human being even in war.

Brett draws out the practical implications: empathy affects split-second decisions at the end of a rifle, interactions with civilians that build intelligence networks (“if you build those relationships they’ll tell you where the bad guys are”), and the ability to stay in flow during missions. Will confirms: “If 50% of your mental bandwidth is taken up by rage, you’re not going to function nearly as well.”

The hate also manifested physically — Will’s hair fell out twice from stress-related alopecia after losing close friends.

“You only have so much mental bandwidth, and if 50% of that is taken up by rage, you’re not going to function nearly as well.”

This is a powerful counter-example to the assumption that emotions are liabilities in high-stakes environments. Even in combat, emotional health makes you more effective.

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