Originally Posted by
LesterOfPuppets
Helmets degrade the bicycle handling traits and situational awareness traits in the gene pool, allowing those that lack both a greater opportunity to reproduce. If you're citing Darwin and are interested in the Eugenics angle of "survival of the fittest", you'd have to shoot anyone who's cracked two helmets. Or maybe three strikes and you're out
No, the interventionist aspect of eugenics is problematic. In Darwin's observations, the gene-pool selection occurs naturally. If you crack a helmet and emerge unimpaired, you're not selected out of the gene-pool. If, irrespective of whether or not you wear a helmet, you wreck and are no longer capable of reproduction, natural selection has done it's job.
In a modern society, physical skills such as bicycle handling may lose value relative to cognitive skills such as the decision to protect one's cranium during cycle.