Summary

Pierce Butler Burns v. United States (274 U.S. 328…

It consists in willful obstruction and interference with the normal process of industry. It aims at inconveniencing and tying up of production, but stops short of actual destruction or of endangering human life directly.'
'The statute, itself, you will notice, however, denounces sabotage as meaning willful and malicious physical damage or injury to physical property.
Source: Wikisource

Pierce Butler Burns v. United States (274 U.S. 328…

The language excepted to was followed by an instruction containing this:
'If you find, therefore, that this organization advocated sabotage, or any other criminal matters mentioned in the section that I have read, either for the purpose of bringing about a change in industrial control, or a political change, then it would constitute criminal syndicalism.'
While one of the purposes of such improper loading of ships may be to create more work for the men, and so to inflict loss on employers, it is also plainly calculated to endanger the vessels, their cargoes, and the lives of those aboard.
Source: Wikisource

Pierce Butler Burns v. United States (274 U.S. 328…

A 'preamble' was contained in practically all its publications and was printed on the membership card of plaintiff in error. It declares that the working class and employing class have nothing in common; that a struggle must go on between them until the workers organize, take possession of the earth and the machinery of production and abolish the wage system; that the trade unions aid the employing class to mislead the workers into the belief that they have interests in common with their employers
Source: Wikisource

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