It was created because antifederalists (people who opposed having a very strong government) were afraid of their rights being abused. So, they invented the Bill of Rights to make sure that no person could ever do it a second time.
If you remember, they were traumatized because the British king would be unfair towards them.
The United States of America
Public works administration
The Legislative branch would likely hold the most power as it would be able to create law outside of any Constitutional constraints.
Second would be the Executive branch, especially the modern executive branch.
The Judicial Branch would be largely useless and would not be a co-equal branch of government.