What we call nowadays totalitarianism belongs to a tradition which is just as old or just as young as our civilization itself - Karl Popper

Science may be described as the art of systematic oversimplification.

The tactical situation seems simple enough. Thanks to Marx’s prophecy, the Communists knew for certain that misery must soon increase. They also knew that the party could not win the confidence of the workers without fighting for them, and with them, for an improvement of their lot. These two fundamental assumptions clearly determined the principles of their general tactics. Make the workers demand their share, back them up in every particular episode in their unceasing fight for bread and shelter. Fight with them tenaciously for the fulfilment of their practical demands, whether economic or political. Thus you will win their confidence. At the same time, the workers will learn that it is impossible for them to better their lot by these petty fights, and that nothing short of a wholesale revolution can bring about an improvement. For all these petty fights are bound to be unsuccessful; we know from Marx that the capitalists simply cannot continue to compromise and that, ultimately, misery must increase. Accordingly, the only result — but a valuable one — of the workers’ daily fight against their oppressors is an increase in their class consciousness; it is that feeling of unity which can be won only in battle, together with a desperate knowledge that only revolution can help them in their misery. When this stage is reached, then the hour has struck for the final show-down. This is the theory and the Communists acted accordingly. At first they support the workers in their fight to improve their lot. But, contrary to all expectations and prophecies, the fight is successful. The demands are granted. Obviously, the reason is that they had been too modest. Therefore one must demand more. But the demands are granted again44. And as misery decreases, the workers become less embittered, more ready to bargain for wages than to plot for revolution. Now the Communists find that their policy must be reversed. Something must be done to bring the law of increasing misery into ope

The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological rule, and since the demarcation between science and nonscience is vague. But it is more than sharp enough to make a distinction between many physical theories on the one hand, and metaphysical theories, such as psychoanalysis, or Marxism (in its present form), on the other. This is, of course, one of my main theses; and nobody who has not understood it can be said to have understood my theory.

The situation with Marxism is, incidentally, very different from that with psychoanalysis. Marxism was once a scientific theory: it predicted that capitalism would lead to increasing misery and, through a more or less mild revolution, to socialism; it predicted that this would happen first in the technically highest developed countries; and it predicted that the technical evolution of the 'means of production' would lead to social, political, and ideological developments, rather than the other way round.

But the (so-called) socialist revolution came first in one of the technically backward countries. And instead of the means of production producing a new ideology, it was Lenin's and Stalin's ideology that Russia must push forward with its industrialization ('Socialism is dictatorship of the proletariat plus electrification') which promoted the new development of the means of production.

Thus one might say that Marxism was once a science, but one which was refuted by some of the facts which happened to clash with its predictions (I have here mentioned just a few of these facts).

However, Marxism is no longer a science; for it broke the methodological rule that we must accept falsification, and it immunized itself against the most blatant refutations of its predictions. Ever since then, it can be described only as nonscience — as a metaphysical dream, if you like, married to a cruel reality.

Psychoanalysis is a very different