Why was it important to list 27 reasons the colonists wanted to be free from King George and Great Britain?

The grievances is a section from the Declaration of Independence where the colonists listed their problems with the British government, specifically George III. The United States Declaration of Independence contains 27 grievances against the decisions and actions of George III of Great Britain.
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Is best known for his work in assisting free blacks who wanted to emigrate to Sierra Leone. Cuffe