Karl R. Popper 
Objective Knowledge [EPUB ebook] 

Objective Knowledge:An Evolutionary Approach is an important later work of the famous western philosopher Karl Popper. During this period, the author’s research focus expanded from methodology to the ontological status of knowledge and thus to the interpretation of the nature and structure of the world and the evolution of the universe.In this book, he put forward the famous theory of "Evolution of Knowledge" and the theory of "Three Worlds", which arouse great interst and heated debate of philosophers and scientists worldwide, and has important reference value for our study on western scientific philosophy.