This book provides new perspectives on the twentieth-century history of philosophy of science through the person of Ernest Nagel. Being one of the philosophical and institutional motors of the new discipline of philosophy of science, Ernest Nagel is still much underappreciated by scholars. By including a major intellectual biography of Nagel's life and works (written by his daughter Yvonne Nagel and narrated through the personal correspondence of Ernest Nagel), this book provides a unique opportunity for researchers. The Nagel-Hempel correspondence is published here for the very first time, enabling scholars to get a sense of how logical empiricism emigrated to the States, got acclimatized, and took over American philosophy in less than two decades.