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Critically consider evolutionary explanations for human intelligence Intelligence is a hard word to define. Eysenck defined intelligence as 'the all-round mental abilities or thinking skills either of human or of lower species.' These include problem solving, reasoning, predicting events, memory and language. Another definition of intelligence is 'the ability to adapt, survive and thrive in response to changing environmental demands. Taking both these definitions of intelligence, we can deduce that human intelligence must be a development from the lower species, and the greater the ability to problem solve, reason, predict events, remember and use language the more evolved the intelligence. Evolutionary explanations for intelligence fall into two categories - the ecological explanation and the social explanation. The ecological explanation looks at and measures intelligence in terms of ability to find and obtain food, using tools and hunting. Animals with more advanced cognitive maps (i.e. those with better memories for where food can...

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