One way to do this will be preventing and treating non-communicable disease, so that middle aged people can continue to work and earn. It will involve fighting the blight of ageism in a youth-dominated global culture. It will follow as much an empowerment model as a provision model. The Mentally Ill Surveys from a wide variety of settings show that about one patient in three has a mental health component to their illness. We can argue about definitions and proportions but the ocean of unrecognised, untreated and dismissed mental suffering worldwide is a scandal.
Some countries have virtually no psychiatric services.
For others, asylums resemble mediaeval prisons. Few community health programmes have a mental health component. There needs to be an explosion of care, intelligent response, logistics, training and delivery in this area before the sheer numbers of those suffering from depression, dementia, anxiety and substance abuse paralyse us by the brutality of their size. This is an area requiring visionary and lateral thinkers, twinning with movers and implementers. It's as much a pioneer field in the developing world as surgery was 100 years ago.