Here is a detailed examination of Elizabeth Anscombe's revolutionary work in the philosophy of human action. Anscombe's place in the history of analytical philosophy is critically examined taking into consideration the influence other philosophers had on her thinking, philosophers such as Wm. James, Kant, Bertrand Russell, Saul Kripke, Hans Reichenbach, R. Chisholm, Donald Davidson and others. In addition, issues of causation - such as her criticism of Hume - are considered in some detail.