What was the major reason for fighting in the civil war, according to president lincoln?

-slavery
-preserving the union
-prove to the south that he was a strong leader
-lincoln was against war

The major reason for fighting in the Civil War, according to President Lincoln was:

-Preserving the Union

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.