Actually, the bill of rights was an Anti-Federalist idea. The Federalists opposed changing the document that had been put together fearing another long and drawn out affair would put the country in danger of blowing apart into thirteen countries, or some combination of thereof. This would put us in danger of being re-subjugated from without. They were not against the bill of rights as such. The Federalists felt that the existing document was protection enough. What you see now is the compromise (constitution and first ten amendments) that came to pass.