Origins and Education -- Institute for Advanced Study, 1948–1949, Theory -- Berkeley, 1949–1950, Accelerators -- Properties of Pi Mesons -- Strange Particles and Bubble Chambers -- Neutrinos I -- CP Violation -- Neutrinos, II -- Experiments with the LEP e+e? Collider.Embedded in an autobiographic framework, this book retraces vividly and in some depth the golden years of particle physics as witnessed by one of the scientists who made seminal contributions to the understanding of what is now known as the Standard Model of particle physics. Well beyond a survey of interest to historians of sciences and researchers in the field, this book is a must for all students and young researchers who have learned about the theoretical and experimental facts that make up the standard model through modern textbooks only. It will provide the interested reader with a first hand account and deeper understanding of the multilayered and sinuous development that finally led to the present architecture of this theory.