Magic Poriferan
^He pronks, too!
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Where does good come from?
Harvard’s Edward O. Wilson tries to upend biology, again
Some excerpts:
Interesting stuff. I'm afraid I'm with the heretics on this one. To be very brief, I don't understand how group selection wouldn't happen.
Harvard’s Edward O. Wilson tries to upend biology, again
Some excerpts:
Natural selection means that the fittest pass down their genes to the next generation, and every organism would seem to have an overwhelming incentive to survive and reproduce. Yet, strangely, self-sacrifice exists in the natural world, even though it would seem to put individual organisms at an evolutionary disadvantage: The squirrel that lets out a cry to warn of a nearby predator is necessarily putting itself in danger. How could genes that lead to such behavior persist in a population over time? It’s a question that bedeviled even Charles Darwin, who considered altruism a serious challenge to his theory of evolution.
The currently accepted explanation for altruism is something known as kin selection theory. It says that an organism trying to pass its genes down to future generations can do so indirectly, by helping a relative to survive and procreate. Your brother, for example, shares roughly half your genes. And so, by the dispassionate logic of evolution, helping him produce offspring is half as good for you as producing your own. Thus, acting altruistically towards someone with whom you share genetic material does not really constitute self-sacrifice: It’s just a different way of promoting your own genes. Wilson was one of the original champions of kin selection theory, but 40 years later, he is calling it a “gimmick,†and is imploring his colleagues to give it up.
The alternative theory holds that the origins of altruism and teamwork have nothing to do with kinship or the degree of relatedness between individuals. The key, Wilson said, is the group: Under certain circumstances, groups of cooperators can out-compete groups of non-cooperators, thereby ensuring that their genes — including the ones that predispose them to cooperation — are handed down to future generations. This so-called group selection, Wilson insists, is what forms the evolutionary basis for a variety of advanced social behaviors linked to altruism, teamwork, and tribalism — a position that other scientists have taken over the years, but which historically has been considered, in Wilson’s own word, “heresy.â€
Interesting stuff. I'm afraid I'm with the heretics on this one. To be very brief, I don't understand how group selection wouldn't happen.