James Harrington was a 17th-century English political theorist and writer, best known for his work "The Commonwealth of Oceana." Born in 1611, he advocated for a republican form of government and emphasized the importance of land ownership in political power. His ideas contributed to the development of modern democratic thought. Harrington's theories were influenced by the political climate of his time, particularly the English Civil War. He believed that a balanced government could prevent tyranny and promote the common good. His work has been referenced in discussions about republicanism and political philosophy throughout history.