Short Answer 
The American and French Revolutions were pivotal movements aimed at promoting democratic values influenced by Enlightenment ideas. While both revolutions sought to eliminate oppressive powers, their causes, methods, and outcomes differed significantly, with the American Revolution leading to a stable government and the French Revolution characterized by radical change and chaos.
Step 1: Understanding the Revolutions
The American and French Revolutions were crucial movements aimed at eliminating oppressive powers and implementing democratic values. Both revolutions were significantly influenced by the ideas of the Enlightenment, emphasizing concepts such as liberty, equality, and fraternity. They played vital roles in shaping modern democratic governments and inspired future revolutionary efforts globally.
Step 2: Key Causes and Outcomes
The American Revolution (1775-1783) arose from issues like taxation without representation, trade restrictions, and the desire for independence from British rule. It concluded with the formation of the United States and the drafting of a Constitution that highlighted individual freedoms and the principle of a government with divided powers. Conversely, the French Revolution, starting in 1789, was motivated by economic struggles, social inequalities, and reflected revolutionary ideals, resulting in the overthrow of the monarchy and the establishment of a republic.
Step 3: Comparing Similarities and Differences
Both revolutions sought to dismantle absolute power and promote republican governance. However, their paths diverged sharply; the American Revolution was a colonial uprising leading to a stable government, while the French Revolution was a more radical movement marked by extensive violence, such as the Reign of Terror, and resulted in several changes of government and ongoing instability. Key differences include:
- The American Revolution focused on colonial independence, while the French sought to reform a domestic monarchy.
- The French Revolution experienced more internal chaos and violence compared to the American struggle.
- The outcomes of each revolution differed significantly in terms of governmental stability and structure.