A perceived threat to the French Revolution.

A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when?

The French National debt and a broken tax code.

Some major causes of the French Revolution were incapable rulers, unbalanced Estates General, economic collapse, Enlightenment ideas, and wasteful royalty.

there were many social, economic, and political problems.