Final answer:
Lincoln blames the Confederate States for the Civil War due to their refusal to negotiate.
Step-by-step explanation:
In his assessment, Lincoln blames the Confederate States, particularly those that first seceded, for refusing to negotiate, placing the blame for the Civil War on their actions. He believed that their refusal to negotiate and their decision to secede from the Union ultimately led to the war. This belief is evident in his inaugural address and subsequent actions during the war.
Learn more about Causes of the Civil War