The quality of the human that precludes identifying the individual with the class is 'metaphysical' and has no place in empiricist epistemology. The pigeon hole into which a man is shoved circumscribes his fate.
The disparagement of empirical evidence in favor of a metaphysical world of illusion has its origin in the conflicy between the emancipated individual of bourgeois society and his fate within that society.
Now that science has helped us to overcome the awe of the unknown in nature, we are the slaves of social pressures of our own making. When called upon to act independently, we cry for patterns, systems, and authorities. If by enlightenment and intellectual progress we mean the freeing of man from superstitious belief in evil forces, in demons and fairies, in blind fate--in short, the emancipation from fear--then denunciation of what is currently called reason is the greatest service reason can render.