Abraham Lincoln winning the President contributed most to the Civil War. After he won the election, southerners were scared that Lincoln would try to get rid of slavery and change their traditions. Once Abe Lincoln was elected, states started to secede (like South Carolina) from the Union just a couple months later. This secession ultimately lead to the confrontation at Fort Sumter, leading to the start of the Civil War.
Workers were affected by scientific management because it caused workers to, in a sense, become replaceable. Workers, under scientific management, were considered to be parts in a machine which could be replaced. Correspondingly, specialization caused tasks to become routine, as workers were completing the same tasks repeatedly to a point were they became bored and exhausted of their jobs. This also led to there being a larger number of injured workers.
Due to the Articles of Confederation, States could override what Congress had established and create their own laws which caused division between the states and caused many issues on currency and of other sorts of important matters. Thus, enabling no authority of control over the power of the differentiating states.