Example of one challenge to change (1. political (2. social and (3. economic

1) Political: In Vietnam, just before the Vietnam war, the North Vietnamese wanted too unite all of Vietnam under communist rule. As the South Vietnamese government was a failure and hated by their own citizens, the Viet Cong was able to take over South Vietnam fairly easy.
2) Social: With the use of Social networks today, ISIS was able to recruit many of their soldiers. However, the challenge too this, is that the US Government had closed down many of the websites and blocked many people from leaving the country (Government challenged the ISIS in the usage of internet) (battle over the network) 
3) Economic: As economies failed during the Great Depression, a German political group called the Nazi's challenged the newly created German government over the right of power. As the government failed to fix the problems, many of the germans wanted to change the government, and elected Hitler as Chancellor. Later on, Hitler became their leader.

these are so examples (yeah their bad people, i know) of how they rose to power. From these facts, we can learn how to keep history from repeating itself

hope this helps