Editing Popper's three worlds (section)

{{Short description|Philosophical way of understanding reality}}
{{redirect|World 3|the grouping of countries known as the "third world"|Third world|the Maoist theory|Three Worlds Theory|the system dynamics model used in The Limits to Growth|World3}}
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'''Popper's three worlds''' is a way of looking at and understanding [[reality]], developed by the British philosopher [[Karl Popper]] in many lectures and books, for example  "Objective Knowledge - An Evolutionary Approach" (1972) and "The Self And Its Brain" (1977). Popper's theory involves three interacting worlds, called '''world{{nbsp}}1''', '''world{{nbsp}}2''' and '''world{{nbsp}}3'''.{{sfn|Eccles|1970|p=163–169}}