John Stuart Mill (20 May 1806 – 8 May 1873) was a British philosopher and civil servant. An influential contributor to social theory, political theory, and political economy, his conception of liberty justified the freedom of the individual in opposition to unlimited state control. I was advised by my philosophy professor that Mill was possessed of the most brilliant mind in history. I do not know on what he based this assertion. Mill was, unquestionably, a man of many parts: the true rennaisance man, so to speak.