I am currently working on an RPG, but I need help with the plot. You see, I want to make a map where you can influence history. For example, if someone assassinated Bush, what would happen to the USA? What if a civil war in the USA started in 2005 and ended with a nuclear attack by Russia in 2015? What would happen if 9/11 was prevented? Also, when is a good year to set this map in?