Some of the most common mental disorders, including depression, anxiety and PTSD, might not be disorders at all, according to a recent paper by Washington State University biological anthropologists.
In the paper, published in the Yearbook of Physical Anthropology, the researchers propose a new approach to mental illness that would be informed by human evolution, noting that modern psychology, and in particular its use of drugs like antidepressants, has largely failed to reduce the prevalence of mental disorders. (This paper was made available online on Nov. 28, 2019 ahead of final publication in the issue on April 28, 2020). For example, the global prevalence of major depressive disorder and anxiety disorders remained steady at 4.4% and 4% respectively from 1990 to 2010.