Why did George mason oppose the constitution

As we all know about the delegate to the convention, but when George mason refused, to sign that constitutio, and then had also lobbied against its ratification, in his own home state. also believping that the document was only a drafted one and was gace as a excessive amount of power to the central government, but was soon incomplete due to the absent of a bill of rights to be able to ensure the indiv liberty

Explanation: hope this helped plz mark brainest!

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