Comment by stevenAthompson

The DSM used to break mental health disorders down into what it called the multi-axial system. Axis 1 being the least impacting diseases, and axis 5 the most severe. At some point we had so many disorders that more than 50% of the population was seen to have Axis 1 or higher mental health disorders. This meant that more of the population was regarded as mentally ill than were considered "healthy."

Rather than accept that >50% of the population being classified as mentally ill might be a sign we were thinking about things in a backwards way they just got rid of the multi-axial system in DSM 5.

Problem solved.