The world’s climate is changing: it has always changed and always will. Intense public discussions on this topic and especially on the policy implications in terms of human activities are testimony to the importance of this issue. The complexity of the systems we are studying is so immense that only great leaders manage to research, describe results, and communicate their implications: one such was Stephen H. Schneider. This book is dedicated to Steve’s triumph as a climate futurologist and to his wish that we continue to explain our research findings urgently and as clearly as possible. This chapter introduces ‘The Future of the World’s Climate’, the topic of this book, and relates its contents to the author’s personal reminiscences of Stephen’s life and work as a vigorous, passionate, and globally-admired climate scientist and world-class communicator.