Why does elliott refer to the "cornerstone speech" of alexander h. stephens in making his argument?

 The correct answer is : Because I wanted to mention evidence that the Civil War was about slavery, also to present diverse perspectives of Native Americans and their relationship with whites. Slavery was the main issue of the United States government. Stephens' speech was called the cornerstone because it describes the great reality of white supremacy and black inferiority on which secession and confederation are based.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

determination