Yellow-dog Contract

A yellow-dog contract (a yellow-dog clause of a contract, or an ironclad oath) is an agreement between an employer and an employee in which the employee agrees, as a condition of employment, not to be a member of a labor union. In the United States, such contracts were, until the 1930s, widely used by employers to prevent the formation of unions, most often by permitting employers to take legal action against union organizers. In 1932, yellow-dog contracts were outlawed in the United States under the Norris-LaGuardia Act.

The term yellow-dog clause can also have a different meaning: non-compete clauses within or appended to a non-disclosure agreement to prevent an employee from working for other employers in the same industry.

Read more about Yellow-dog Contract:  Origin of Term and Brief History

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    The way in which men cling to old institutions after the life has departed out of them, and out of themselves, reminds me of those monkeys which cling by their tails—aye, whose tails contract about the limbs, even the dead limbs, of the forest, and they hang suspended beyond the hunter’s reach long after they are dead. It is of no use to argue with such men. They have not an apprehensive intellect, but merely, as it were a prehensile tail.
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