Monroe didn't effect things to come.
Monroe Doctrine, abandoned in 1959 by Eisenhower!
Yes, the doctrine was in place (I would argue it was abandoned first by Wilson), but the whole geopolitical landscape didn't change as a result of Monroe's presidency. Foreign policy, even in the Western hemisphere, was an afterthought.
Yes, I know that J.Q. Adams wrote the "Monroe Doctrine," but it was Monroe who appointed JQA as secretary of state.