Evolution’s Achilles’ Heels.

In ancient Greek mythology, the great warrior, Achilles, was dipped into the river Styx by his mother to make him immune from all attacks. Holding him by the ankle, she failed to immerse his heel, and this led to his undoing. In common vernacular, an ‘Achilles’ heel’ describes a fatal weakness in spite of apparent overall strength and invulnerability.

Appropriately, the Achilles’ heels of evolution are often in the very areas widely considered to be impregnable strongholds of this belief system. They are: