According to an opinion piece that appeared in the May 16, 2011 edition of the New York Times entitled "Nice Guys Finish First" http://www.nytimes.com/2011/05/17/opinion/17brooks.html?sq=brooks&st=Search&scp=9&pagewanted=print
the conventional view that aggressively self-interested behavior promotes survival is being challenged by recent scientific research:
"In his book, “The Righteous Mind,” to be published early next year, Jonathan Haidt joins Edward O. Wilson, David Sloan Wilson, and others who argue that natural selection takes place not only when individuals compete with other individuals, but also when groups compete with other groups. Both competitions are examples of the survival of the fittest, but when groups compete, it’s the cohesive, cooperative, internally altruistic groups that win and pass on their genes
. The idea of “group selection” was heresy a few years ago, but there is momentum behind it now."
"Human beings, Haidt argues, are “the giraffes of altruism.” Just as giraffes got long necks to help them survive, humans developed moral minds that help them and their groups succeed
This new scientific research seems to support Tom's contention that in the Big Picture, evolution is about moving towards Love.