They are:
Executive: President and about 5 million others - The president enforces the laws.
Legislative: Senate and House of Reps - this part is called congress. Congress makes our laws. Congress is divided in 2 parts; senate and house of reps. Senate is made up of 2 people from each state. House of reps get together and decide if the bills should become laws.
Judicial: Supreme court and lower courts - hear cases that pertain to issues related to the constitution. They are the highest court in the country.
Answer:
From what I remember, it was a revolution that overthrew the Czar and the government. The Czar wasn't very popular after the first world war, they lost a lot of people. The German's sent a radical named Vladimir Lenin back to Russia to get the Russians in a civil war. Backed by the Germans and the disapproval of the Czar, it wasn't hard for the people to listen to the "man of the people" Lenin and eventually overthrow the government.
The answer is Adolf Hitler. He wrote this in Mein Kamph, right before WWII.