Thanks to Walter E. Williams:
Lincoln’s intentions, as well as those of many Northern politicians, were summarized by Stephen Douglas during the senatorial debates. Douglas accused Lincoln of wanting to "impose on the nation a uniformity of local laws and institutions and a moral homogeneity dictated by the central government" that would "place at defiance the intentions of the republic’s founders." Douglas was right, and Lincoln’s vision for our nation has now been accomplished beyond anything he could have possibly dreamed.
The War between the States settled by force whether states could secede. Once it was established that states cannot secede, the federal government, abetted by a Supreme Court unwilling to hold it to its constitutional restraints, was able to run amok over states’ rights, so much so that the protections of the Ninth and Tenth Amendments mean little or nothing today. Not only did the war lay the foundation for eventual nullification or weakening of basic constitutional protections against central government abuses, but it also laid to rest the great principle enunciated in the Declaration of Independence that "Governments are instituted among Men, deriving their just powers from the consent of the governed."