The Monroe Doctrine
Britain supported the doctrine because the Grand Alliance in Europe had given France permission to install the Bourbon Dynasty in Spain. This would have put Spanish lands in French control thus creating a French Empire. Britain had no love for this and put their weight behind the doctrine. The Monroe Doctrine was developed because the United States and Britain were concerned over the possibility of European colonial expansion in the Americas. Britain feared that Spain would attempt to reclaim its former colonies, which had recently gained independence.
Guizot, a French statesman, allegedly said that France did not want one power to control all of North America. Like Monroe, Polk avoided detailing exactly what constituted creating a “balance of power.” Polk kept his interpretation flexible enough to support his active foreign policy (Sexton 106).
The world has accepted US as a world power but at its current state, the country has to struggle hard to maintain that historical image because other ‘powers’ are starting to emerge, like China for instance. This is a challenge for the present and future presidents of the US, in which they should be able to uphold and continue this dominance for as long as they can.