How do the French, American, and Haitian revolution compare to one another

Answer 1

That's a big question, but one which you can manage, if you break it down into: (1) what were the different economic or political reasons for each of the revolutions; (2) what are the broad differences in the ideals of each of the revolutions; (3) what are the differences in the demographics of the agitators of each of the rebellions (e.g. landed gentry vs slaves or peasants). To answer the second part of this question, consider the difference in consequences. (1) Which of these revolutions led to stable governments and which led to continued political turmoil? (2) Were there lasting changes to the politics and economics of these countries?

The key to answering a massive, historical question like this is to break it up into parts.