The Stamp Act of 1765, of which today is the 245th anniversary, inflamed citizens of the 13 colonies and led directly to the American Revolution of 1776. The government of America was fundamentally changed as a result. That was arguably the last fundamental change until about 1940.
American colonists opposing continuation of Britain's suzerainty amounted to about 40% of the population. Yesterday, our present day government defied the will of about 60% of its people, now to be known as "subjects."
The Stamp Act was repealed on March 18th 1766.
I meant to include this link for a more comprehensive examination of this topic;
Why Tea Parties?