After the Emancipation Proclamation, the North’s main goal in the Civil War was to A: end slavery.

B: form an alliance with Europe.

C: end the Union.

D: add border states.

Which concept is plato expressing in the excerpt below? when men have both done and suffered tyranny, and have had experience of both . . they think that they had better agree among themselves to have neither. . —plato, the republic: book ii