Philosophers played an important role in the French Revolution in the following ways 1 philosophers gave major ideas to the common people about the despotic power of the king 2 montesquie presented his ideas in the spirit of laws and have given the ideas of division of power between the executive , judiciary and legeslative. 3 Rossueau had written a book named the social contract division of power between the government 4 many books and newspapers were printed and it was also read loudly for people who were illiterate 5 Abbey siyes also led the third estate being the member of the church hence in such way philosophers helped a lot hope so my answer will help you