Date Added: Jan 2010
Darwin's theory of natural selection asserts that an individual organism that is particularly suited to its environment is more likely to survive than a less fit one. It's every individual for itself. Yet, recent research, such as that performed on ant colonies by Edward O. Wilson at Harvard, suggests that selection can also occur at the group level. It indicates that groups with a superiority in fitness tend to survive at the expense of other groups, and a surviving group tends to be made of individuals that support it with some degree of selflessness.