Successful or Failure?
The American Revolution was successful because the Declaration that was written by Thomas Jefferson in 1776 was to officially and finally separate the Thirteen Colonies from Britain. The reason of the American Revolution was to gain the ability to self govern and that's what they got. America is now unrestricted by outside powers because of the American Revolution.
Did the revolution influence any other revolutions or changes in the world?
The Latin American wars of independence, including the various Spanish American Wars of Independence of 1810-1826 were often inspired at least in part by the American and French Revolution.
The contagion of liberty spread, inspiring people to revolt against their leadership in France, Haiti, Ireland, Poland, the Netherlands, and throughout the Spanish empire.
The contagion of liberty spread, inspiring people to revolt against their leadership in France, Haiti, Ireland, Poland, the Netherlands, and throughout the Spanish empire.