The problem with Darwinian Ethics
A pretty concise summary of the problem with trying to extract a set of morals from Darwinian theories:
The statement “The environment selects some beetles to eat their young” serves a function in biology similar to the function the statement “Nature is fallen” serves in theology. Both have explanatory power, but the biological statement tries to be descriptive, whereas the theological statement is clearly normative. Christianity teaches that nature is not what it God intended it to be, and thus nature alone cannot be a guide to moral behavior. Without that normative claim, however, Darwinian philosophers are left with an environment that selects any kind of behavior as long as it gives a species a competitive advantage. If we do not eat our young when resources are scarce, it is only because nature has selected other strategies for our survival. It follows that morality must be either a heroic but ultimately fruitless struggle against our nature or a rationalization and mystification of self-interested behavior.
More on the subject of ethics and biology at the WSJ.
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