If you're wondering why the Tarahumara don't fight and don't die of heart disease, why a poor Ethiopian woman named Derartu Tulu can be the most compassionate and yet the most competitive, and why we somehow were able to find food without weapons, perhaps it's because humans, as much as we like to think of ourselves as masters of the universe, actually evolved as nothing more than a pack of hunting dogs.
Si se preguntan por qué los tarahumara no luchan o no mueren de enfermedades cardíacas, por qué una etíope llamada Derartu Tulu puede ser a la vez la más compasiva y la más competitiva, y por qué éramos capaces de encontrar comida sin armas, quizá es porque los humanos, aunque nos guste pensar que somos los dueños del Universo, evolucionamos como simplemente una manada de perros de caza.