An injury to one is an injury to all is a motto popularly used by the Industrial Workers of the World (IWW). In his autobiography, Bill Haywood credited David C. Coates with suggesting the phrase as a labor slogan for the IWW. The slogan reflects that the IWW is "One Big Union" and organizes many different types of skilled and unskilled workers. Since its adoption by the IWW, it has been used by a number of other labor organizations and appears in protest signage.
Origin The expression is similar to, and may be derived from, a slogan popularized in the prior quarter century by the Knights of Labor: "that is the best government in which an injury to one is the concern of all".
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See also Unus pro omnibus, omnes pro uno
References
External links Media related to An injury to one is an injury to all at Wikimedia Commons