The Expression of the Emotions in Man and Animals in the James-Lange theory of emotions, James develops Darwin's emphasis on the physical aspects, including the visceral (autonomically mediated) components of emotion. In Walter Cannon's "Bodily Changes in Pain, Hunger, Fear and Rage" (1915), Cannon introduces the famous phrase "fight or flight response", formulating emotions in terms of strategies for interpersonal behaviour. More recent psychological theories of emotion have been set out in the Papez-Maclean hypothesis and the Two factor theory of emotion. On 24 January 1895, James Crichton-Browne delivered a notable lecture in Dumfries, Scotland "On Emotional Expression", presenting some of his reservations about Darwin's views. Crichton-Browne argued for
The Expression of the Emotions in Man and Animals initial correspondence with the psychiatrist James Crichton-Browne Darwin set aside his material concerning emotional expression in order to complete "The Descent of Man", which covered human ancestry and sexual selection. Darwin concluded work on "The Descent of Man" on 15 January 1871. Two days later, he started on "The Expression of the Emotions" and, on 22 August 1872, he finished work on the proofs. In this book, Darwin brings his evolutionary theory into close approximation with behavioural science, although many Darwin scholars have remarked on a kind of spectral Lamarckism haunting the text of the "Emotions". Universal Nature of Expression: