I am not completely sure but would it be answer number 4? Sorry if I am wrong, it just makes more since to me.
I'm not sure if this will help, but Twain was against imperialism. He spoke out against what happened in the Philippines during the Philippine-American War (in which rebels fought against the US for not recognizing them as a republic -- this after the Spanish American War) and was concerned over the direction that the country was taking with those actions. Keith, on the other hand, was a businessman and entrepreneur who eventually created the United Fruit Company. Through his business holdings in Costa Rica and the Central American region, his companies managed to influence a great deal of the local economy. Instead of using armies and soldiers to take over a country, his companies did the same thing -- through the economy -- turning many areas into private preserves that fed his business interests. In that way, he was definitely something of an imperialist.
The 19th President of the United States was Rutherford B. Hayes.
An enormous question.
The Holocaust, which seems to have been the result of German Chancellor's "final solution" to the "Jewish Problem". Kill them all, by the cheapest means possible. And, to do that, the chancellor had to "get his supporters to buy his message". That was done by nationwide indoctrination, anything from banning "Jew physics" (a blunder of a ban, because Jews, Professors Einstein and Lisa Meitner to name but two associated with the Nobel prize in physics, played important roles in developing nuclear weapons), through to indoctination of the dreaded "Hitler youth", via "krystalnacht" and the mass transportation of as many Jews as could be tranported to death camps "hidden" in eastern europe near the USSR border.
And this is only part of the start to the answer.
It may well be impossible to do this subject justice anywhere ...
