The Evolutionary Race To Stand Still

To survive in nature, organisms must evolve just to stay in the same place. Constant change is necessary because their predators and rivals are always improving their own survival tactics simultaneously.

Named after the character in Through the Looking-Glass, this theory explains why species cannot simply rest on their evolutionary laurels. Even if an organism is well-adapted, it faces a continuous biological arms race against parasites and competitors. This pressure explains why sexual reproduction persists, as shuffling genes helps stay one step ahead of fast-evolving diseases. Without this relentless cycle of adaptation, even the most successful species would quickly go extinct.