One of the most important similarities between both the American Revolution and French Revolutions was that there was a growing dissent among the people aimed at the monarchy and its associated elite and aristocrats.
A good one hundred years separates the Glorious Revolution (1688–1689) from the French Revolution (which began in 1789)
Each of the three could be framed as rebellions against monarchical overreach.
7 years war (war debt), Taxes, Enlightenment Ideas
Hope this helped!
Good luck :p
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~ Emmy