Final answer:
Thomas Paine was the author of the influential pamphlet called Common Sense, which played a key role in advocating for American independence from Great Britain in 1776.
Step-by-step explanation:
Thomas Paine published many pamphlets favoring independence called Common Sense. Using simple, direct language aimed at reaching ordinary people, Paine's influential work was instrumental in shaping public opinion towards the idea of independence from Great Britain. Common Sense emphasized simple facts, plain arguments, and an appeal to common sense as a rationale for the American colonies to pursue a republican form of government and reject monarchy and the British Empire. By spring 1776, the pamphlet had made a profound impact, influencing sentiments in Congress and helping to lay the groundwork for the Declaration of Independence, which was adopted on July 4 of the same year.