Reference: Lund C, De Silva M, Plagerson S, Cooper S, Chisholm D, Das J, Knapp M, Patel V. Poverty and mental disorders: breaking the cycle in low-income and middle-income countries. Lancet 2011; 378: 1502–14.

The main driver for much of the global development movement (and by extension, global health) is reduction of poverty.  It is also worth noting that without reduction in global poverty, efforts to reduce mental ill health through focused interventions are unlikely to be effective.