Isolationism.
President James Monroe has instituted a policy of US withdrawal from Europeans. This was because, according to Monroe, Europe intended to resume the colonization process.
The president's ideology became known as The Monroe Doctrine, according to which "the American continents, by virtue of the free and independent condition they have acquired and preserved, can no longer be considered in future as susceptible to colonization by any European power."
It was in this context that Monroe said his celebrated phrase: America for the Americans.
Hi!
As you may know, the Ming emperor stopped the production of ships back in 1435, which was also the year of Zheng He’s death.
Because ships were no longer being produced, China’s explorations halted and Chinese population lost its need to explore other cultures. This ended up resulting in the Chinese empire being weakened and stunned in growth