Psychiatry is a profession that has placed all its fets on biology as the sole answer to these problems, which i think is ak a. All the work we've done in your science, an genetics y, other attempts to understand the neurer biology of the brain have led f to very little progress. And that's obviously hampered our ability to treat diseases. It's not unknown for medicine to not, in general, to not know the causes of disease, and yet be able to come up with effective treatments. Why do people become depressed? The answer is, we don't really know. But because of thet absence, we have some clues. We have some speculations.