“It is demonstrable,” said he, “that things cannot be otherwise than as they are; for as all things have been created for some end, they must necessarily be created for the best end. Observe, for instance, the nose is formed for spectacles, therefore we wear spectacles. The legs are visibly designed for stockings, accordingly we wear stockings.”
- Candide by Voltaire
Humans are unique among the great apes (of which we are one) in various ways. One of them is our possession of a very long Achilles tendon, which is quite short in chimpanzees, gorillas, and orangutans.