Open access. Mental health and the failings of the mental health services are in the spotlight as never before. Nowhere is this more apparent than in the often dire situation with regard to child and adolescent mental health. At the same time, there is a renewed interest in the scope for prevention of mental illness and distress, and in population approaches to mental well-being. It may come as a surprise to some that others have given such serious consideration to strategic approaches to public mental health as long ago as the 1950s.