The sentence:
What is true is that organisms tend to act according to ethical fitnessism, which is what I stated.
does not imply any causation.
Natural selection favours certain behaviour, and ethical fitnessism is simply defined as:
…the ethic whose behaviour tends to be maximized as a consequence of natural selection.
Which behaviour that is is an open scientific question. There is no claim that ethical fitnessism causes organisms to perform any behaviour; natural selection is the cause.
I’m wondering if there are any fellow chess players here on Less Wrong. I’m a Fide Master from Sweden, ELO rating ~2300.
I think it would be interesting to get some statistics on the strength of the chess players here and relate that to other LW community statistics, such as IQ for example.