Galápagos

A million years in the future, the ghost of Leon Trout recounts how a small group of survivors shipwrecked on the Galápagos Islands became the sole ancestors of the human race. Following a global financial crisis and a biological plague of infertility, humanity evolves into a species of aquatic mammals. The novel satirically explores the evolutionary drawbacks of the oversized human brain and the eventual devolution of man into a simpler form.