Most of the material deals with Pugwash conferences and symposia (presented together as a chronological sequence), with some correspondence at MS. Eng. c. 7955/9-11. The Pugwash conferences, primarily concerned with worldwide nuclear disarmament, began in 1957 (see MS. Eng. c. 7955/11). Conferences and symposia became annual events at international venues, widening their scope and acquiring a complex organisation as many national groups developed worldwide. Though Hodgkin was entirely in agreement with the aims of Pugwash, and attended conferences from 1962, she did not become actively involved until 1975 when she accepted an invitation to become President, formally taking over in 1976, and remaining in office until 1988.