Why are the construction of walls, in reality, is troubles instead of a solution?

What is institutional discrimination in the social work field

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.

And the spark struck out by that steed, in his flight, kindled the land into flame with its heat.what do you think he meant