That wasn’t really Freud’s achievement though. There are many early psychologists who deserve credit for this much more than him, such as William James, Gustav Fechner, Wilhelm Wundt, Hermann Ebbinghaus, or (later) B. F. Skinner.
Freud’s work was mostly in the medical tradition, developed independently from the emerging psychological science of that time, and that’s where his theories still have the largest impact.
That wasn’t really Freud’s achievement though. There are many early psychologists who deserve credit for this much more than him, such as William James, Gustav Fechner, Wilhelm Wundt, Hermann Ebbinghaus, or (later) B. F. Skinner.
Freud’s work was mostly in the medical tradition, developed independently from the emerging psychological science of that time, and that’s where his theories still have the largest impact.