There is a rule known to physicians that ‘a true diagnosis of a case contains in itself the therapy’. No true diagnosis is possible, however, without investigation of the ‘history’ of the case. Applied to our task, this means that we must try to find an aspect of human development, both individual and historical, which will enable us to recognize in man’s own being the cause responsible for the peculiar narrowing of the scope of scientific inquiry, as described by the scientists cited above.