After World War I, President Wilson went to Europe to help write the peace treaty that ended the War.
Was he within his Constitutional powers when he negotiated a treaty? Where is that
addressed?

a drastic rise in oil prices ended decades of postwar.

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.