Cognition-Based Evolution is the first comprehensive alternative to 20th-century Neodarwinism, proposing a radical 21st-century evolutionary framework with a novel point of origination: all cells are intelligent and must measure uncertain environmental information to sustain themselves. In Cognition-Based Evolution, life is defined by cognition. From this differential stance, evolutionary biology transforms into the science of why, how, what, and with whom cells measure and communicate under stressful environmental conditions. Life’s context is uncertain environmental information, communication is its means, and genes are its tools. Evolution is its yield as continuous non-random self-referential cellular problem-solving.