Answer:
The rise of nationalism
The desire for national self-rule
The desire to unify territories
Nobody else could build that canal. The Americans are the only people who could build them. They also made the Panama canal so that they could access the necessary territory.
After the fall of the Ching Dynasty, the Republic of China (RoC) emerged. However it was riven by internal strife. Much of the early years was spent fighting the various warlords. After the death RoCs founder Sun Yat-Sun, he was succeeded by Chiang Kai Shek aka Generalissimo. He spent much of his time building up the Chinese army and fighting other warlords and the Communists. It was effectively strongman politics. Sun Yat-Sun and Chiang Kai Shek were not elected, so in a sense, similar to Communists. Chiang was aligned with the West. Mao with the Soviets. An interesting bit of trivia is that the crack Chinese units were trained by the Germans. They gave a good account in the Battle for Shanghai, although their strength was depleted after that. This is why some Chinese officers used the Mauser C96 aka Broomhandle pistol.
The cotton gin was innovated by Eli Whitney and is important to the 1800d because of what it did to the innovation of cotton production in the south. Prior to the machine, enslaved people were forced to hand process cotton, now with the machine, more cotton was able to be processed faster which allowed for slavery to continue and expand in the south so that more cotton could be sold to Britian (who did not have the land for cotton growing) and the northern factories to be made into clothes (increasing production of the industrial revolution especially with the Lowell mills). This will be important later with the Civil War as the south believes that Britian will support them because of their trading history and need for cotton (which of course is not done, due to racial tensions between the newly freed persons of Britian and the enslaved system of the South).
1.The expanded role of the federal government ended with the Depression.
