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Why did colonists oppose the Stamp Act?

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American Revolution *The Surrender of Lord Cornwallis* (at Yorktown, Virginia, on October 19, 1781), oil on canvas by John Trumbull, completed in 1820; in the U.S. Capitol Rotunda, Washington, D.C. The painting captures the moment when major fighting during the American Revolution ended and the colonies achieved independence.

The Stamp Act of 1765 faced intense opposition from American colonists primarily because it was the first "internal" tax levied directly on them by the British Parliament to raise revenue. Previously, colonial taxes were either imposed by local authorities or were "external" trade duties intended to regulate commerce for the benefit of the empire.12

Colonists vehemently opposed the act based on the fundamental constitutional principle that they could only be taxed by their own consent through their own representative assemblies. They viewed the tax as a violation of their rights as Englishmen, arguing that they could not be subject to taxation without representation.12

Beyond the constitutional argument, the act was economically burdensome, striking at vital commercial and legal operations during a period of postwar financial difficulty. The protest was widespread, involving the formation of the Sons of Liberty, riots, and the convening of the Stamp Act Congress, which collectively signaled a growing spirit of unity and resistance that eventually contributed to the American Revolution.12