Dr. Michael Tomasello, co-director of the Max Planck Institute for Evolutionary Research in Leipzig, Germany, suggests in his book, Why We Cooperate, that the tendency to help is innate. He points out that infants across varied cultures display helping behavior prior to its being taught by parents. Infants, he says, are prone to help even though the act exists outside of a rewards framework. There is no payoff for their actions, which implies that they come naturally.

As children become socialized, Dr. Tomasello continues, they become selective with their helpfulness. They may be more likely to help someone who has been nice to them, for example. Though the helpfulness may become more specialized, it is always there. Dr. Frans de Waal agrees. He says, in the recently published The Age of Empathy, "We're preprogrammed to reach out." In fact, Dr. de Waal believes that this biological predisposition is one of humanity's greatest attributes, a pure and insuppressible trait that serves as a check against manmade constructions like politics.

As it satisfies personal and inborn goals, a career in a medical field may be one of the most rewarding since, as Dr. Tomasello puts it, "We are both selfish and altruistic at the same time."