I also have to laugh every time some oblivious multicellular animal announces that evolution is all about competition, and that all that matters is how many progeny you produce. Do you realize that your existence is entirely a product of cooperation? Your parents were made up of trillions of cells, almost all of them dedicated to specialized, non-reproductive functions, all in support of a tiny minority of cells that can produce gametes. And of all those gametes, only two combined to make you — the great lumbering mass of agglomerated metazoan cells that were your parents then dedicated themselves to cooperatively nurturing the little zygote that was you (and which was not genetically identical to either) into a roughly similar lumbering mass.
Further, if that’s too abstract for you, consider this: you’d most likely be dead right now if scientists hadn’t collaborated to make vaccines against childhood diseases, if doctors and family hadn’t worked to keep you healthy and educated. Imagine all those carpenters who built your house and plumbers who put in the pipes and electricians who wired it up; imagine the vast combines that work to deliver fuel for heating and food for eating. Everything that you think is important about you was created by cooperation.
If you think otherwise, go masturbate into a mud puddle and hope that some of your offspring can make it without any assistance.
-PZ Myers on cooperation.