Thomas Dixon is a historian of emotions, philosophy, science, and religion at Queen Mary University of London, where he directs the Centre for the History of the Emotions. A regular contributor to radio and television programmes as an academic consultant, interviewee, and presenter, he was the consultant for Ian Hislop's Stiff Upper Lip: An Emotional History of Britain, a three-part BBC Two series in 2012. The author of several books and numerous articles on the history of ideas, in 2008 he was awarded the Dingle Prize (for the best book on the history of science accessible to a wide readership) for his Science and Religion: A Very Short Introduction, also published by Oxford University Press. In 2014, he wrote and presented a fifteen-part series, Five Hundred Years of Friendship, for BBC Radio 4.

Today there is a thriving 'emotions industry' to which philosophers, psychologists and neuroscientists are contributing. Yet until two centuries ago 'the emotions' did not exist. In this path-breaking study Thomas Dixon shows how, during the nineteenth century, the emotions came into being as a distinct psychological category, replacing existing categories such as appetites, passions, sentiments and affections. By examining medieval and eighteenth-century theological psychologies and placing Charles Darwin and William James within a broader and more complex nineteenth-century setting, Thomas Dixon argues that this domination by one single descriptive category is not healthy. Overinclusivity of 'the emotions' hampers attempts to argue with any subtlety about the enormous range of mental states and stances of which humans are capable. This book is an important contribution to the debate about emotion and rationality which has preoccupied western thinkers throughout the eighteenth and nineteenth centuries and has implications for contemporary debates.