Russian Unique Cross

Revolutions - This is my final!!!!!!!!?

Of the America, French, Russian, and Iranian Revolutions:
1. Using these revolutions as a representative cross-section, what characteristics do all political revolutions share? How do those characteristics play out in the long-term for each revolution?
2. What makes each revolution unique? What are the short- and long-term effects of these specific characteristics?
3. Are political revolutions inevitable? What factors influence political revolutions that create negative outcomes?
4. Of the four revolutions, which has been/will continue to be impactful on the course of world history? Why?

Answers to any of these questions will be so helpful!!!!!!!!!!!!
I am doing my own work but wanted to see if anyone could help me so I could do 20% of my grade more thoroughly.

I'll give you hints, but you should do your own work, not expect other people to help you.
1. Ultimately, what do people want in life? Who controlled each nation?
2. American-colonies, same type of government
French-abolished a form of government
Russian-economics
Iranian-religion
Look at the progression of revolution.
3. Take a look at dialectic materialism. Also look at Thermidor Reaction.
4. This should be answered based on your research of the previous three questions.