What was a major grievance of the colonists against Great Britain?

A major grievance of the colonists against Great Britain was the lack of representation in Parliament, famously summarized by the phrase "no taxation without representation." Colonists were frustrated by the imposition of taxes and laws, such as the Stamp Act and Townshend Acts, without their consent or input. This perceived violation of their rights as Englishmen fueled growing resentment and calls for independence. Ultimately, these grievances contributed significantly to the American Revolution.