Sir John Chipman KCMG served as Director-General and Chief Executive of the International Institute for Strategic Studies (IISS) from 1993 to 2023. Along with his tenure as Executive Chairman since 2023, and the research positions he held from 1983 before being appointed Director, this represents a professional lifetime spent at the IISS. The Institute enjoys its current reputation for excellence in research and convening, as well as its wide international reach and influence, thanks to Sir John’s successes over many decades. This Adelphi book is a tribute to Sir John’s work at and contribution to the Institute. It highlights three areas of intellectual leadership through his writings, spanning broadly the decades he worked at the IISS: strategic studies after the end of the Cold War; regionalism and regional security; and corporate foreign policy. Selected writings by Sir John in these three areas are reprinted here in their original form. They are paired with commentaries by a number of notable friends of the IISS, written specially for this book.