Final answer:
President Lincoln addressed disunion in his inaugural speech by asserting the preservation of the Union as his primary goal, focusing on the unconstitutionality of secession, and seeking gradual approaches to dealing with slavery.
Step-by-step explanation:
In his inaugural address, President Abraham Lincoln revealed that he hoped to avoid disunion by asserting the preservation of the Union as his primary goal. Lincoln aimed to ease concerns in the South while maintaining his stance on preventing the expansion of slavery into new territories
. His speech outlined the unconstitutionality of secession and expressed his determination to maintain federal power. Importantly, while Lincoln emphasized the permanency of the Union, he did not advocate for the immediate abolition of slavery, but rather supported a gradual approach that included possible colonization options for freed slaves to avoid immediate social upheaval.