“The idea is that once recruits have taken control of a few situations, they start to learn how good it feels. “We never tell anyone they’re a natural-born leader. ‘Natural born’ means it’s outside your control,” Krulak said. “Instead, we teach them that leadership is learned, it’s the product of effort. We push recruits to experience that thrill of taking control, of feeling the rush of being in charge. Once we get them addicted to that, they’re hooked.”