David Livingstone Smith in Aeon:
Most people think of Sigmund Freud as a psychologist or a psychiatrist. But he was neither. He was trained as a neuroscientist and went on to create a new discipline that he called ‘psychoanalysis’. But Freud should also be thought of as a philosopher – and a deeply insightful and prescient one at that. As the philosopher of science Clark Glymour observed in 1991:
Freud’s writings contain a philosophy of mind, and indeed a philosophy of mind that addresses many of the issues about the mental that nowadays concern philosophers and ought to concern psychologists. Freud’s thinking about the issues in the philosophy of mind is better than much of what goes on in contemporary philosophy, and it is sometimes as good as the best …
In fact, it’s impossible to really understand Freudian theory without coming to grips with its philosophical undercurrents. This might sound strange, given the many derogatory remarks about philosophy that are scattered through Freud’s writings and correspondence. But these remarks are easy to misinterpret. Freud’s verbal barbs were not directed at philosophy per se. They were directed at the kind of philosophy that was dominant during his lifetime – philosophy of the speculative, armchair variety that remains aloof from scientific investigations of the material world, often described as ‘metaphysics’, a subject that he characterised as ‘a nuisance, an abuse of thinking’, adding: ‘I know well to what extent this way of thinking estranges me from German cultural life.’
To come to grips with the philosophical thrust of Freud’s thinking, it is crucial to place it in its historical context. Born in 1856 in a village in what is now the Czech Republic, Freud enrolled in the University of Vienna just at the time when the sciences of the mind were gaining momentum. Although he initially planned to study law with the intention of pursuing a career in politics, and also toyed with the idea of doing a joint PhD in zoology and philosophy, he eventually found his way to neurology. In entering this field at just that moment, the young Freud launched himself into an incredibly exhilarating and dynamic intellectual milieu. For neuroscientific researchers, the daunting scientific challenge of figuring out how the brain works (without the benefit of the sophisticated technologies available today) was compounded by the equally formidable philosophical challenge of explaining the relationship between the electrochemical impulses coursing through a massively complex network of neurons and the experiential fabric of our subjective mental lives – our thoughts, values, perceptions, and choices.