Answer: Steel plow, Mechanical reaper would have caused people in mid-west to grow corn or wheat crops. The steamboats would have given southerners opportunity to ship their cotton or sugar up-river, the cotton gin, and steel plow. The north east would have used sewing machines, textile mills and interchangeable parts would have lead people to promote factory work.
Yes because they got us out of debt. They also purified most of the racial segregation. Men in war thought that African Americans were being unfairly drawn sometimes.
He founded the meatpacking company "Armour and Company" in Chicago in 1867, which matches the American businessman and 19th century parts of your question. I hope this helps!