The Monroe Doctrine became one of the crucial foundations of American foreign policy, history discussion help

The Monroe Doctrine became one of the crucial foundations ofAmerican foreign policy over the next century; what was the occasion forMonroe's articulation of this doctrine, and what were the circumstancesmotivating its adoption?What reasons were used by Monroe to justify this foreignpolicy pronouncement, and how do they relate to arguments made during therevolutionary and early republic periods?