“So long as commerce specializes in business methods which take no account of human nature and social motives, so long may we expect strikes and sabotage to be the ordinary accompaniment of industry. Sabotage is essentially a protest of the human spirit against dull mechanism. And the emphasis which democracy places upon political methods tends to transform mere sporadic acts of sabotage into an organized conspiracy against society.”

All Gall Is Divided (1952)

Source: Terrorism and Communism (1920), Ch. 2

The Mass Psychology of Fascism (1933), Ch. 10 : Work Democracy

Testimony on Internment of people of Japanese Ancestry before the House Select Committee Investigating National Defense Migration (Tolan Committee) in 1941; of this statement Warren later said, in The Memoirs of Earl Warren (1977):
I have since deeply regretted the removal order and my own testimony advocating it, because it was not in keeping with our American concept of freedom and the rights of citizens. Whenever I thought of the innocent little children who were torn from home, school friends, and congenial surroundings, I was conscience-stricken. It was wrong to react so impulsively, without positive evidence of disloyalty, even though we felt we had a good motive in the security of our state. It demonstrates the cruelty of war when fear, get-tough military psychology, propaganda, and racial antagonism combine with one's responsibility for public security to produce such acts. I have always believed that I had no prejudice against the Japanese as such except that spawned by Pearl Harbor and its aftermath.
1940s

Music as an Aspect of the Human Spirit (1954).

Source: Nationalism and Culture (1937), Ch. 1 "The Insufficiency of Economic Materialism"
Context: However fully man may recognise cosmic laws he will never be able to change them, because they are not his work. But every form of his social existence, every social institution which the past has bestowed on him as a legacy from remote ancestors, is the work of men and can be changed by human will and action or made to serve new ends. Only such an understanding is truly revolutionary and animated by the spirit of the coming ages. Whoever believes in the necessary sequence of all historical events sacrifices the future to the past. He explains the phenomena of social life, but he does not change them. In this respect all fatalism is alike, whether of a religious, political or economic nature. Whoever is caught in its snare is robbed thereby of life's most precious possession; the impulse to act according to his own needs. It is especially dangerous when fatalism appears in the gown of science, which nowadays so often replaces the cassock of the theologian; therefore we repeat: The causes which underlie the processes of social life have nothing in common with the laws of physical and mechanical natural events, for they are purely the results of human purpose, which is not explicable by scientific methods. To misinterpret this fact is a fatal self-deception from which only a confused notion of reality can result.

Source: Industrial and General Administration, 1916, p. 68 ; as cited in: Albert Lepawsky (1949), Administration, p. 6-7

Chap. V, The Period of Dictatorship
"Hitlerism and Social Democracy" (1934) https://www.marxists.org/archive/kautsky/1934/hitler/index.htm

"The Speedy Extinction of Evil and Misery", part VII, p. 92
Essays and Phantasies (1881)