Franz Barta · No restrictions

Karl Popper argued that scientific theories can never be proven true, only tested against evidence that might prove them false — a standard, falsifiability, that became a working definition of what separates science from pseudoscience through much of the twentieth century. He founded the philosophy department at the London School of Economics and was an unrelenting opponent of totalitarianism in every form he saw it — communist, fascist, and nationalist — arguing instead for the open, self-correcting societies that liberal democracy makes possible.