What caused the French Revolution:
Cultural: The Enlightenment philosophy desacralized the authority of the monarchy and the Catholic Church, and promoted a new society based on reason instead of traditions.
Social: The emergence of an influential bourgeoisie which was formally part of the Third Estate (commoners) but had evolved into a caste with its own agenda and aspired to political equality with the clergy (First Estate) and the aristocracy (Second Estate).
With these this is what caused the French of Revolution because the cultural and social where very importance to the people and especially the social without it the commoners wouldn't be able to know how unfair the estates system were. Also, One of the most obvious failures of the French Revolution was the Reign of Terror from 1793-94. The Terror, which was orchestrated by Robespierre and his followers, was ostensibly a way to provide for the security of the Republic by exposing traitors to the people. In reality, it was used by Robespierre as a means to consolidate and strengthen his hold on power. Instead of putting into practice the democratic ideals of liberty and equality that he spoke of in public, Robespierre used the Terror to execute or imprison thousands of people who he viewed as a threat. The Terror came to an end only after Robespierre himself was sent to the guillotine.
Reign of terror
The reign of terror a period in the French Revolution. It was indicated to destroy enemies and to chase enemies out of the French territory. The French Revolution began not only as a revolt against the monarchy but had a powerful anti-clerical and were a very large ashiest of Revolutionaries. One of the more iconic development was the cult of the "goddess of raeson". It was largely met with skepticism.The reign of terror led to massive loss of lives in France. It’s estimated that about 17,000 people were guillotined and this included high level persons like King Louis and his wife Antoinette, Robespierre, Danton, and other persons of high profile were put to death. Also, The reign of terror led to the downfall of political clubs and political pluralism in France. Before the reign terror, there were some political parties that were formed such as The Jacobin under Robespierre, Cordllier under Danton and Girondin led by Murato. But the terror machinery killed all the leaders of these political Parties in France.
Impact on other countries
The French Revolution caused Europe to led to a series of wars between various countries and the French. It also led to the rise of Napoleon and the empire he won, albeit briefly. Also, The French Revolution caused the US a great deal of trouble. First, it helped split the country between pro-British and pro-French factions. Second, it led to many problems in foreign policy. The French and British went to war, and the US was caught in between with both countries preying on US shipping to the other country. This eventually led to near-war with the French and finally to the War of 1812 with the British. Austria and Prussia were especially appalled by this harsh treatment of Louis XVI. Encouraged by the émigrés, these two nations issued the Declaration of Pillnitz on August 27, 1791, warning France that if any harm came to the king, they would intervene, militarily if necessary. Their warning went unheeded, and Louis' situation only became more tenuous. By early April of the following year, Austria and Prussia had issued a circular letter requesting other nations to join in an alliance against France.