Much of his research was devoted to the history of
psychoanalysis and the life and work of
Sigmund Freud; he also studied the work of
Jacques Lacan for many years, including co-translating two of Lacan's Seminars. His PhD thesis became his first published book,
Language and the Origins of Psychoanalysis (1980), which argued for the considerable influence of the sciences of language, from neurology (aphasia) to philology, on the development of Freud's psychoanalysis. ''Freud's Women'' (1992), co-written with
Lisa Appignanesi, explored the part that women played in Freud's work and the history of psychoanalysis, from patients to practitioners, including the extensive debates over the nature of femininity that took place in Freud's work, during his lifetime and in second wave feminism of the 1960s and 1970s. He has also published three collections of papers:
The Seductions of Psychoanalysis. Freud, Lacan and Derrida (1990);
Dispatches from the Freud Wars. Psychoanalysis and its Passions (1997), about the so-called
Freud Wars, in which he contends with some contemporary critiques of psychoanalysis (
Stanley Fish,
Adolf Grünbaum,
Frederick Crews,
Frank Sulloway), criticising their outmoded conceptions of science, and the sterility of contemporary debates concerning the scientific status of psychoanalysis; and
Truth Games. Lies, Money, and Psychoanalysis (1997). He had extensive interests in cases as a genre and as a style of reasoning, linked to the prominence of the case history in psychoanalytic work and writing, and has published a series of papers on cases, including the influential 'If p then what? Thinking in cases'. In later years, he published (in part with
Laura Jean Cameron) papers documenting the reception of psychoanalysis in early twentieth century Cambridge. He was editor of the journal
Psychoanalysis and History (2005–14).
Thinking in Cases, the volume that contains "If P then what" and other essays on the case, came out soon after he died. His final book,
Freud in Cambridge (co-authored with Laura Jean Cameron), was finished before his death, and was published in 2017 by Cambridge University Press.
Sander L. Gilman said of it "this is one of the most important books on twentieth-century British intellectual history I have read in a long time". ==Personal life==