Benjamin Graham was an English-American financial analyst, economist, accountant, investor and professor. He is widely known as the "father of value investing", and wrote two of the discipline's founding texts: Security Analysis (1934) with David Dodd, and The Intelligent Investor (1949). His investment philosophy stressed independent thinking, emotional detachment, and careful security analysis, emphasizing the importance of distinguishing the price of a stock from the value of its underlying business.
Source: Wikipedia
