Final answer:
The excerpt aims to convince readers of Britain's unfair treatment towards the American colonists, leading to the decision to declare independence.
Explanation:
The author's purpose in this excerpt from the Declaration of Independence is to convince readers that Britain has treated the colonists unfairly. The passage highlights how the British government failed to address the grievances of the American colonists despite appeals to justice and kinship, ultimately leading to the decision to separate from Britain. It emphasizes the justification for declaring independence and the tyranny experienced under British rule.
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