That's a quote from a character in the film Breaker Morant . Lord Kitchener: Needless to say, the Germans couldn't give a damn about the Boers. The diamonds and gold of South Africa they're after. Major Bolton: They lack our altruism, sir. Lord Kitchener: Quite. Michael Shermer has an interesting post over on Skepticblog.com where he endeavors to demonstrate just how altruism might have evolved in spite of "The Banker's Paradox." It's a plausible story, untestable though as far as I can tell. Still it's at least a way it might have happened, or maybe not, who knows? :-)