Answer:
Manifest Destiny was the idea that white Americans were divinely ordained to settle the entire continent of North America.
The ideology of Manifest Destiny inspired a variety of measures designed to remove or destroy the native population.
US President James K. Polk (1845-1849) is the leader most associated with Manifest Destiny.
Manifest Destiny inflamed sectional tensions over slavery, which ultimately led to the Civil War.Explanation:
That slaves were treated unfair than the rest of the citizens
I can't see the text but as for your question most of the history in the history books seem (to most) to have happened a lifetime ago so they don't really see how it retains to them and their lives. They live in the present time so they want present events. I believe that although past history is important to learn, we must also take notice of the historic events that are taking place right now. It lets us know what countries are doing (I.e war,trade,ect.) as well as our own and how we are involved in the affairs we are currently in. Most importantly it as a lesson and a reminder to the future generations on how certain events caused certain destruction. It is a stain in time so to speak so they will not take the action's we took in the past to lead them to the repetition of our past and current mistakes.
Yes he was, he was justified because article two grants him authority to issue executive order.