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Food: The Driving Force of Evolution
Of the large mammals, only the dolphin comes anywhere near the same brain-to-body size as humans. How did we evolve this way? In The Driving Force: Food, Evolution, and the Future, Michael Crawford, PhD, and David Marsh have given us a plausible answer. Crawford and Marsh consider food the driving force in the evolution of living organisms on Earth. They theorize that our ancestors developed on the shores of oceans and rivers, areas with a great abundance and diversity of food. They suggest that our relatively large brain could develop in such a seashore area because all the necessary nutrients were available in abundance.