When did christopher columbus start exploring

Why did jefferson make the louisiana purchase?

Explain one major pattern of cultural interaction between nomadic and sednetary socities in afro eurasia before 1450 ce

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.