This volume is dedicated to the life and work of Ernest Nagel (1901-1985) counted among the influential twentieth-century philosophers of science. Forgotten by the history of philosophy of science community in recent years, this volume introduces Nagel's philosophy to a new generation of readers and highlights the merits and originality of his works.Best known in the history of philosophy as a major American representative of logical empiricism with some pragmatist and naturalist leanings, Nagel's interests and activities went beyond these limits. His career was marked with a strong and determined intention of harmonizing the European scientific worldview of logical empiricism and American naturalism/pragmatism. His most famous and systematic treatise on, The Structure of Science, appeared just one year before Thomas Kuhn's even more renowned, The Structure of Scientific Revolutions. As a reflection of Nagel's interdisciplinary work, the contributing authors' articles are connected bot