If many of the taxa-defining homologs are non-adaptive, the whole Darwinian enterprise breaks down entirely.
Today is Darwin Day, marking the birthday of Charles Darwin, who is celebrated around the world as a secular saint.
If nature is so fine-tuned for life’s environment, might the fine-tuning not also include a set of laws of form, geared to actualize the forms of life on earth?
A structuralist view suggests the biological realm is undergirded by “crystal-like” primal patterns, specified in the laws of nature.
While Darwin’s finches demonstrate that natural selection can generate small degrees of adaptive change, they also reveal sharp limits to the mechanism.