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 case. It is an interesting psychological metaphysics (and no doubt there is some truth in it, as there is so often in metaphysical ideas), but it never was a science. There may be lots of people who are Freudian or Adlerian cases: Freud himself was clearly a Freudian case, and Adler an Adlerian case. But what prevents their theories from being scientific in the sense here described is, very simply, that they do not exclude any physically possible human behaviour. Whatever anybody may do is, in principle, explicable in Freudian or Adlerian terms. (Adler's break with Freud was more Adlerian than Freudian, but Freud never looked on it as a refutation of his theory.)The point is very clear. Neither Freud nor Adler excludes any particular person's acting in any particular way, whatever the outward circumstances. Whether a man sacrificed his life to rescue a drowning, child (a case of sublimation) or whether he murdered the child by drowning him (a case of repression) could not possibly be predicted or excluded by Freud's theory; the theory was compatible with everything that could happen—even without any special immunization treatment.Thus while Marxism became non-scientific by its adoption of an immunizing strategy, psychoanalysis was immune to start with, and remained so. In contrast, most physical theories are pretty free of immunizing tactics and highly falsifiable to start with. As a rule, they exclude an infinity of conceivable possibilities.
Our life is like a journey…’ – and so the journey seems to me less an adventure and a foray into unusual realms than a concentrated likeness of our existence: residents of a city, citizens of country, beholden to a class or a social circle, member of a family and clan and entangled by professional duties, by the habits of an ‘everyday life’ woven from all these circumstances, we often feel too secure, believing our house built for all the future, easily induced to believe in a constancy that makes ageing a problem for one person and each change in external circumstances a catastrophe for another. We forget that this is a process, that the earth is in constant motion and that we too are affected by ebbs and tides, earthquakes and events far beyond our visible and tangible spheres: beggars, kings, figures in the same great game. We forget it for our would-be peace of mind, which then is built on shifting sand. We forget it so as not to fear. And fear makes us stubborn: we call reality only what we can grasp with our hands and what affects us directly, denying the force of the fire that’s sweeping our neighbour’s house, but not yet ours. War in other countries? Just twelve hours, twelve weeks from our borders? God forbid – the horror that sometimes seizes us, you feel it too when reading history books, time or space, it doesn’t matter what lies between us and it.But the journey ever so slightly lifts the veil over the mystery of space – and a city with a magical, unreal name, Samarkand the Golden, Astrakhan or Isfahan, City of Rose Attar, becomes real the instant we set foot there and touch it with our living breath.