"How can genetically prescribed selfless behavior arise by natural selection, which is seemingly its antithesis?" "This problem has vexed biologists since Darw

"How can genetically prescribed selfless behavior arise by natural selection, which is seemingly its antithesis?" "This problem has vexed biologists since Darwin, who in The Origin of Species declared the paradox — in particular displayed by ants — to be the most important challenge to his theory." "Eusociality is not a marginal phenomenon in the living world. The biomass of ants alone composes more than half that of all insects and exceeds that of all terrestrial nonhuman vertebrates combined. Humans, which can be loosely characterized as eusocial, are dominant among the land vertebrates." http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3279739/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3279739/