The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.
Source: Bertrand Russell: The Triumph of Stupidity（ (10 May 1933） More Info.：https://russell-j.com/0583TS.HTM
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In "Today's Words of Russell," Russell identifies cocksureness, particularly as seen in modern people, especially those in power, as the fundamental cause of the confusion (or turmoil) in contemporary society. Cocksureness is one of the things Russell detested most, as those who possess power and are excessively certain can bring great harm to the world.
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