Lysander Spooner was a northern abolitionist and a champion of liberty. He wrote this about the war:
"Notwithstanding all the proclamations we have made to mankind, within the last ninety years, that our government rests on consent, and that that was the rightful basis on which any government could rest, the late war has practically demonstrated that our government rests upon force --- as much so as any government that ever existed."
Here is the full essay written in 1867:
http://lysanderspooner.org/node/44In past posts I have stated that America was like no other country, but Lincoln's war changed that causing us to be like all other countries of the world, as Spooner said in the above quote.
Spooner:
"The principle, on which the war was waged by the North, was simply this: That men may rightfully be compelled to submit to, and support, a government that they do not want; and that resistance, on their part, makes them traitors and criminals.
No principle, that is possible to be named, can be more self-evidently false than this; or more self-evidently fatal to all political freedom. Yet it triumphed in the field, and is now assumed to be established. If it really be established, the number of slaves, instead of having been diminished by the war, has been greatly increased; for a man, thus subjected to a government that he does not want, is a slave. And there is no difference, in principle --- but only in degree --- between political and chattel slavery. The former, no less than the latter, denies a man's ownership of himself and the products of his labor; and [*iv] asserts that other men may own him, and dispose of him and his property, for their uses, and at their pleasure."