How old was martin luther king when he was in 12th grdae?

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.

What was president theodore roosevelt’s square deal

On which point did william lloyd garrison and frederick douglass disagree?