A philosophical critique of co-existing mental health and substance use challenges — and a practical case for redesigning the systems that fail them.
Sources: Royal College of Psychiatrists (2025); national treatment data summarised in Chapter 1.
Across the UK, the US, Australia and Europe, mental distress and substance use co-occur at extraordinary rates — and the systems built to respond to them remain split down the middle. People are referred and re-referred, dropped for missing appointments, or turned away in crisis because they are “too high” for mental health care or “too distressed” for substance use services.
Our systems are not failing because of a few bad policies or underperforming services; they are failing because they are built on a broken ontology. This is not an individual failing. It is design. And design can be changed.— From the Preface