The Human TKTL1 Mutation, the Evolution of Intellect, and a Spectacular Risk of Misinterpretation.

[eppur_se_muova]

1. Evolution is the realization of statistical effects on a massive scale.

I tend to think of genes not so much as cause-and-effect mechanisms as devices that 'tend to' steer things one way or another, with the final outcome determined by the net operation of such tendencies across many genes within the same organism, and many organisms within a population. Simple cause and effect gets rather washed out in such an enormous space of possibilities.

Not something that makes for sexy headlines, unfortunately.