Popper's three worlds
This cosmological approach is directly opposed to any form of reductionism that argues that we can ultimately explain whatever comes later in the known universe in terms of what came before.The three worlds may be understood, in terms of this evolutionary and cosmological framework, as containing three categories of entity: These include the states and processes that we seek to explain by physics and by chemistry, and also those states and processes that subsequently emerge with life and which we seek to explain by biology.In Popper's view, World 3 'objects' encompass a very wide range of entities, from scientific theories to works of art, from laws to institutions.This includes abstract objects such as scientific theories, stories, myths and works of art.Popperian cosmology rejects this essentialism, but maintains the common sense view that physical and mental states exist, and they interact.