Final answer:
The ideas contained in the Monroe Doctrine are largely those of John Quincy Adams and the doctrine warned European nations to refrain from interfering with independent countries in the Americas.
Step-by-step explanation:
The ideas contained in the Monroe Doctrine are largely those of John Quincy Adams. Adams, who was the U.S. Secretary of State at the time, drafted the statement and believed that the United States needed to make a forceful statement asserting its opposition to future European colonization in the Western Hemisphere. The Monroe Doctrine warned European nations to refrain from interfering with independent countries in the Americas.