There are certain regions, such as art and science, and (so far as public order allows) party politics, where uniformity is not necessary or even desirable. These are the legitimate sphere of competiton, and it is important that public feeling should be such as to bear differences on such matters without exasperation. Democracy, if it is to succeed and endure, demands a tolerant spirit, not too much hate, and not too much love of violence.
Source: Power, 1938.
More info.: https://russell-j.com/beginner/POWER18_260.HTM