What was the central message of the Roosevelt Corollary to the Monroe Doctrine?

Answer 1

The Roosevelt Corollary to the Monroe Doctrine was a substantial alteration (called an "amendment") of the Monroe Doctrine by U.S. President Theodore Roosevelt in 1904. In its altered state, the Monroe Doctrine would now consider Latin America as an agency for expanding U.S. commercial interests in the region, along with its original stated purpose of keeping European hegemony from the hemisphere. In addition, the corollary proclaimed the explicit right of the United States to intervene in Latin American conflicts exercising an international police power.

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http://en.wikipedia.org/wiki/Roosevelt_Corollary

Answer 2

the untied states would use force to prevent intervention in the affairs of neighboring countries