That's the headline of an article referenced at neurosciencenews.com, and about research being published in Molecular Psychiatry.
You want to read this. It is consonant with most of the research of the last century. And yet the scientists cannot face the empirical implications of their research -- man is not even captain of the boats in his bathtub.
I will only highlight here, the last sentence in the review, a quote by a University College of Cork researcher:
"We're really excited by these findings" said lead author Dr Gerard Clarke. "Although we always believed that the microbiota was essential for our general health, our results also highlight how important our tiny friends are for our mental wellbeing."
Dear Doctor Clarke, what if, what if--- humans are the tiny friends of microbiota? I am not saying that is the case, I am saying we are stuck in a crippling perspective which prevents our drawing empirical conclusions. And, really, that perspective is only crippling from the point of view of someone struggling to understand their selves as well as the cosmos. For a student of Jan Cox, the views of scientists are just part of the world to be studied.