I am quite sure there was strong selection pressure for the willingness to take risks. Taking down big game with Paleolithic weapons is not for the timid. And since humans are so pleasure driven, enjoying the feeling of an adrenaline rush would be a big advantage as well. On the other hand, if you die in the process, your mate will have a much harder time feeding your fetal or nursing offspring and your older offspring will have a harder time making it to reproductive age so they can pass on your genes. So in evolutionary terms, the drive to be really masterful at what you do (like a Navy Seal), must balance the pleasure from an adrenaline rush.
Originally Posted by jfreaksho
I wonder if the decreasing availablity of useful tasks in modern life that are also dangerous doesn't encourage crazy stuff like going 160mph on a motorcycle. I doubt this guy had the discipline to be a Navy Seal, but he might have enjoyed something like being a diver on an oil rig. Or something. Or maybe he really was suicidal on some level.
CW-125, part calorie counting, part transition to primal
GW- Goals are no longer weight-related