Franz Brentano's classic study Psychology from an Empirical Standpoint was the most important of Brentano's works to be published in his lifetime. A new introduction by Peter Simons places Brentano's work in the context of current philosophical thought. He is able to show how Brentano has emerged since the 1970s as a key figure in both contemporary European and Anglo-American traditions and crucial to any understanding the recent history of philosophy and psychology.