If we're going to write up a constitution, I think it would be helpful if we started doing some research for it. Individuals could list the works that are influential to them in their political thinking and affects how they think a constitution should be.
Here are some of mine:
Dan Carlin's Hardcore History: Death Throes of the Republic I-VI. Dan Carlin - Hardcore History Archive
This series talks about the fall of the Roman Republic and how internal strife and foreign wars caused it to fall and then be remade into the Roman Empire.
Mike Duncan's The History of Rome. The History of Rome
An extensive history of Rome, from the mythical times when it was a kingdom to the foundation of the Republic to its evolution to an Empire and currently at the split between East and West. The timespan is greater in scope but it is not as specific as Dan Carlin's history.
The Thomas Jefferson Hour. The Thomas Jefferson Hour
Clay S. Jenkinson discusses topics and answers questions as Thomas Jefferson. Provides a really good insight into how the U.S. Constitution was formed, especially from one who portrays a harsh critic of it. Particular focus should be on those episodes dealing with Alexander Hamilton.
The Federalist Papers by Alexander Hamilton, John Jay, and James Madison. LibriVox » The Federalist Papers, by Alexander Hamilton, John Jay, and James Madison
The original publications from the writers of the U.S. Constitution providing a defense of the document to the American people.
The Anti-Federalist Papers by Patrick Henry and Others. LibriVox » The Anti-Federalist Papers, by Patrick Henry
The critiques of the U.S. Constitution as made by those of the same generation as the Founding Fathers. It was because of these critiques that the Bill of Rights were amended to the U.S. Constitution.
Binge Thinking History: Episode 01 - Can You Sign This Your Majesty? Binge Thinking History Podcast: 01. Can you sign this your Majesty?
A historical timeline of documents that limit the government and protect the rights of citizens, starting in Britain at least.
Politics Portal at Wikipedia. Portal:Politics - Wikipedia, the free encyclopedia
A place to start learning various political ideas and systems that you are interested in or want to learn more about.
Political Tropes at TVtropes. Politics Tropes - Television Tropes & Idioms
An easier to read, more entertaining explanation of political ideas and events.
No list is complete without some Frederic Bastiat. You can't go wrong with any of his material but most relevant are probably The Law, Government, and Harmonies of Political Economy.