[Lucius Cornelius Sulla]

I don't understand why James Monroe isn't on the list.

Because they knew John Quincy Adams was responsible for this doctrine, and they put HIM on the list.

[crasher]

But they were both responsible. Monroe after all made the decision to follow the view of JQ Adams against the rest of his cabinet and the preliminary advice of his two mentors - Madison and Jefferson. And it isn't like the Monroe Doctrine was the only thing Monroe did. He should be on the list.