Answer:
The railroad boom began in 1862, when president Abraham Lincoln signed the Pacific Railway Act. This act offered two companies land along its right of way in order to speed progress. What railroad had a more difficult time with building their rail line due to the Rocky Mountains.
Explanation:
When agriculture began, the early people farmed, and soon got a surplus of food. This surplus of food meant that not everyone had to farm, and that led to specialized jobs. Specialized jobs led to trade which led to economy, a major key point in a civilization.
ONe large one is that a ruler can not rise to power without a consensus of other people in the government and the public. A dictatorship is nearly impossible with a representative democracy.
The second one, Bolsheviks and anti-tsarists