Science was born as a result and consequence of philosophy; it cannot survive without a philosophical (particularly epistemological) base. If philosophy perishes, science will be next to go.
It is not the special sciences that teach man to think; it is philosophy that lays down the epistemological criteria of all special sciences.
The disintegration of philosophy in the nineteenth century and its collapse in the twentieth have led to a similar, though much slower and less obvious, process in the course of modern science.
Today’s frantic development in the field of technology has a quality reminiscent of the days preceding the economic crash of 1929: riding on the momentum of the past, on the unacknowledged remnants of an Aristotelian epistemology, it is a hectic, feverish expansion, heedless of the fact that its theoretical account is long since overdrawn—that in the field of scientific theory, unable to integrate or interpret their own data, scientists are abetting the resurgence of a primitive mysticism. In the humanities, however, the crash is past, the depression has set in, and the collapse of science is all but complete.
The clearest evidence of it may be seen in such comparatively young sciences as psychology and political economy. In psychology, one may observe the attempt to study human behavior without reference to the fact that man is conscious. In political economy, one may observe the attempt to study and to devise social systems without reference to man.
It is philosophy that defines and establishes the epistemological criteria to guide human knowledge in general and specific sciences in particular.