When you have watched your friends die in your arms, felt the flesh rot off your feet, and gone nose to nose with pure evil, going the extra mile with an investor—laughing at his dumb jokes, having that extra late-night drink when you’d much rather be home with your family, and sniping the in-house competition by inserting the right word at the right time into the boss’s ear—is like R&R in Hawaii compared to day-to-day wartime Vietnam. I used to just laugh