The influential pamphlet "Common Sense" was authored by Thomas Paine in 1776. This pamphlet played a pivotal role in galvanizing American colonists against British rule by making a compelling and accessible case for independence. Paine argued that it was common sense for the colonies to break free from the tyranny of the British monarchy and establish their own government based on democratic principles. The publication gained widespread readership and sparked revolutionary fervor among the colonists, inspiring many to support the cause for independence from Britain and contributing significantly to the American Revolutionary War.