The author of "Common Sense" advocating for American independence was Thomas Paine. Published in 1776, this pamphlet played a crucial role in galvanizing public opinion in favor of independence from British rule. Paine presented compelling arguments against monarchical government and hereditary succession, asserting that America had the potential to be a beacon of freedom and democracy. His accessible writing style and persuasive rhetoric resonated with a wide audience, contributing to the growing revolutionary sentiment. "Common Sense" ultimately became a foundational text in the American independence movement and influenced the Declaration of Independence.