President Wilson demanded that the Germans stop unannounced submarine warfare; however, he didn’t believe the U.S. should take military action against Germany. Some Americans disagreed with this nonintervention policy, including former president Theodore Roosevelt
In March 1916, a German U-boat torpedoed a French passenger ship, the Sussex, killing dozens of people, including several Americans. Afterward, the U.S. threatened to cut diplomatic ties with Germany
In response, the U.S. severed diplomatic ties with Germany on February 3. During February and March, German U-boats sank a series of U.S. merchant ships, resulting in multiple casualties.
Here’s what I got from an article
Sumner was physically attacked by Brooks in Congress because "<span>d. Sumner challenged the Fugitive Slave Act and angered pro-slavery supporters" since he was an avid abolitionist. </span>
If your friend is a business owner in a planned economy, then it would be the "central government" that decides how to allocate the productive resources he uses, since the government "plans" the economy as opposed to having supply and demand take place in the marketplace.
Southern plantation owners, because they needed slaves to do any/all farm work. Their plantations were huge and slaves were technically cheaper then hiring people.