Elementary Processes at High Energy, Part B documents the proceedings of the eighth Course of the International School of Subnuclear Physics, held in Erice, Italy in July 1970. The said conference is devoted to different areas of great influence and importance to the field of particle physics. The book is divided into three parts. Part I covers specialized topics such as the status of some relevant problems in nuclear physics; possible failure of the Pomeranchuk Theorem; and external fields in the Lee-Wick Theory. Part II discusses the future of high-energy physics, and Part III is the closing lecture, which includes the history and present status of weak interactions. The text is recommended for physicists who would like to know more about the advancements and the general direction of research in particle physics, high-energy physics, and related fields.