How do psychological micro-foundations—the basis of Lebow’s work from the beginning—lead to a comprehensive international relations theory at the macro-level, organize a majestic journey through human history, and permit a new reading and arguing about the causes of war, the three major achievements of his work in the last decade? In order to understand the micro-macro connection, we have to pay attention to the shift in the psychological basis of Lebow’s work that occurred between the publication of ‘Between Peace and War’ (Lebow 1981) and the appearance of the “Tragic Vision of Politics” (Lebow 2003). This shift could be called “The Greek turn”.