The answer is: Lincoln claimed to defend the Union and attempted to convince the South that the secession was illegal and impossible.
Lincoln gained massive popularity on the northern states because he advocated for the establishment of slavery, and the south was threatening secession because they relied heavily on slavery as the major workforce that sustain their economy.
Lincoln realized that if the southern states manage to secede from united states, The republican party would receive the largest amount of blame for the separation, and their chance to free the slaves in southern states were gone. Because of this, he swore an oath to defend the union and prevent the south from seceding in his inaugural address.
Answer:
He believed that more wealth to common people would benefit a nation's economy and society as a whole.
Explanation:
In The Wealth of Nations, Smith described a self-regulating market. It was self-regulating because people produced according to what people would buy and people consumed according to what they wanted and could afford.
In a display of his political genius, President Lincoln shrewdly justified the Emancipation Proclamation as a “fit and necessary war measure” in order to cripple the Confederacy's use of slaves in the war effort. ... With the issuance of the Emancipation Proclamation freedom for slaves now became a legitimate aim.
They don't teach it enough perhaps ?