Dr. Ronald C. Kessler, Professor of Health Care Policy at Harvard Medical School is most widely recognized as the world’s most published and influential psychiatric epidemiologist. He has been internationally known over the last few decdes for leading major national and global epidemiological surveys on the population prevalence and correlates of mental disorders. His work has transformed how the field understands the burden, distribution, and treatment of common mental illnesses and suicide-related behaviors. Dr. Kessler was the Principal Investigator of the US National Comorbidity Survey, the first nationally representative survey of mental disorders in the United States, and numerous follow-up and replication studies that have mapped changes in mental health and service use over time. He served as Director of the World Health Organization World Mental Health Survey Initiative, a program of community surveys in over 30 countries that has provided the empirical foundation for national mental health policies and resource allocation decisions worldwide.
In a new interview published today in Genomic Psychiatry by Genomic Press, Dr Kessler describes how population-scale surveys across more than 30 countries revealed staggering treatment gaps and what he is now doing to close them. Recognized as the most cited author in psychiatry and psychology worldwide, with more than 1,300 publications cited over 330,000 times, Dr. Kessler built the infrastructure for measuring mental illness at the population level, work that spans continents and has reshaped how governments allocate resources for psychiatric care.
He discusses his career path and choices and highlights things he might have done differently or at a different point in time. He also describes the things that have influenced him and what were his primary focal points within his chosen field of science. He discusses what he enjoys most in his life’s work and what he believes still needs to be accomplished in the field.
He also describes how he spends his “off-time” and what he does for fun and enjoyment.
A part 2 is a series of selected questions from the Proust Questionnaire.
Citation: Kessler, RC. Shining Light on the Hidden Impact of Mental Disorders on People and Communities Everywhere. Genomic Psychiatry. Publ.. Feb 3, 2026. DOI: 10.61373/gp026k.0021