Comment by eevilspock

> altruism is perfectly at home with modern evolutionary theory

To add to your point, which I'm sure is in reference to macro-level phenomenon such as the interdependence of species, symbiosis, ecosystem complexity and the like, it's important to note that multi-cellular organisms are the epitome of individuals (cells) working for the greater good rather than local self-interest. Eons ago single cells started working together and specializing. White blood cells, neural cells and muscle cells don't compete against each other, much less is there white blood cell on white blood cell competition. When cells behavior breaks from the greater good, we call it cancer.

A perfect example of pure self interest is the virus.

Interesting that many people do consider capitalism akin to cancer, or that it behaves virally.