In practical politics it is important as an ally. [fact]
It tends to emphasize the will at the expense of the intellect, to be impatient of chains of reasoning, and to glorify violence of certain kinds. In practical politics it is important as an ally of nationalism. In tendency, if not always in fact, it is definitely hostile to what is commonly called reason, and tends to be anti-scientific.
Bertrand Russell, History of Western Philosop…, loc. 2637