What role did islam play throughtout these early african empires

One specific historical event or development during the period 1786-1861?

Two books are used to model tectonic plates

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.