This World Health Organization (WHO) report, published in 2005, examines the effectiveness of mental health prevention initiatives. 

From the report:

Prevention of Mental Disorders: Effective Interventions and Policy Options includes a selective review of the available evidence from a range of countries and cultures. Current knowledge is still mainly based on research in high income countries, although new research initiatives are emerging in developing countries. The current trend to exchange evidence-based programmes across countries challenges us to expand our understanding of the role of cultural and economic factors in prevention.

Both this Summary Report and the Full Report upon which it is based have been written for people in the many health and non health sectors of governments and nongovernmental agencies in countries with low, medium and high levels of income and resources. These people are in a position to significantly influence the  determinants of mental and behavioral disorders and the effectiveness of prevention efforts in ways that may not be obvious to them. It also offers insight into the spectrum of opportunities for health and mental health professionals to contribute to primary prevention and early intervention alongside treatment and rehabilitation. It supports health promoters in integrating mental health issues into their national and local health promotion and prevention policies and activities. It stimulates prevention and health promotion researchers to expand their knowledge of designing and implementing effective interventions. Prevention of Mental Disorders: Effective Interventions and Policy Options is written with the conviction that reducing the incidence of mental disorders in populations worldwide is only possible through successful collaboration between the multiple partners involved in research, policy and practice, including community leaders and consumers.

Full report: Prevention of Mental Disorders (PDF | 672 KB) 

World Health Organization & the Prevention Research Center of the Universities of Nijmegen and Maastricht. (2005). Prevention of mental disorders:  effective interventions and policy options – summary report.  Hosman, C., Jane-Llopis, E, & Saxena, S. eds.