# Popper's three worlds | | **Popper's three worlds** is a way of looking at reality, described by the British philosopher Karl Popper in a lecture given in August 1967. The concept involves three interacting worlds, called world 1, world 2 and world 3. | | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | wikipedia:: [Popper's three worlds](https://en.wikipedia.org/wiki/Popper's_three_worlds) |