Believe it or not, people generally don't like killing other people, game theory be damned. Witness, for example, the US army having to develop particular trai

Believe it or not, people generally don't like killing other people, game theory be damned. Witness, for example, the US army having to develop particular training to reduce the 20%-odd soldiers who ended up just not firing their weapon at all when in action (no data on how many fired but intentionally mis-aimed).