It may be bad to suppress a particular opinion, but the really deadly thing is to suppress the news. In time of great insecurity, certain opinions acting on unstable minds may cause infinite disaster. Knowing that such opinions necessarily originate in slender evidence, that they are propelled more by prejudice from the rear than by reference to realities, it seems to me that to build the case for liberty upon the dogma of their unlimited prerogatives is to build it upon the poorest foundation. For, even though we grant that the world is best served by the liberty of all opinion, the plain fact is that men are too busy and too much concerned to fight more than spasmodically for such liberty. When freedom of opinion is revealed as freedom of error, illusion, and misinterpretation, it is virtually impossible to stir up much interest in its behalf. It is the thinnest of all abstractions and an over-refinement of mere intellectualism. But people, wide circles of people, are aroused when their curiosity is baulked. The desire to know, the dislike of being deceived and made game of, is a really powerful motive, and it is that motive that can best be enlisted in the cause of freedom. What, for example, was the one most general criticism of the work of the Peace Conference? It was that the covenants were not openly arrived at. This fact stirred Republican Senators, British Labor, the whole gamut of parties from the Right to the Left. And in the last analysis lack of information about the Conference _was_ the origin of its difficulties. Because of the secrecy endless suspicion was aroused; because of it the world seemed to be presented with a series of accomplished facts which it could not reject and did not wish altogether to accept. It was lack of information which kept public opinion from affecting the negotiations at the time when intervention would have counted most and cost least. Publicity occurred when the covenants were arrived at, with all the emphasis on the _at_. This is what the Senate objected to, and this is what alienated much more liberal opinion than the Senate represents. In a passage quoted previously in this essay, Milton said that differences of opinion, “which though they may be many, yet need not interrupt the unity of spirit, if we could but find among us the bond of peace.” There is but one kind of unity possible in a world as diverse as ours. It is unity of method, rather than of aim; the unity of the disciplined experiment. There is but one bond of peace that is both permanent and enriching: the increasing knowledge of the world in which experiment occurs. With a common intellectual method and a common area of valid fact, differences may become a form of coöperation and cease to be an irreconcilable antagonism.