Theories of Change in Global Health

Global health interventions aim to improve health in communities.Underlying each intervention is a theory of change that addresses a specific constraint--such as poverty, limited access to clinical care, or weak governance--within the complex system that shapes global health.Theories of change can help explain broad global improvements such as those in life expectancy and child mortality.They can also be used to develop interventions for communities facing serious health problems. As global health problems are complex, different definitions of underlying constraints are often championed by different disciplines.Economists generally favor approaches that address poverty or economic instability; physicians advocate for improved health systems; engineers favor investment in technology; charities emphasize the importance of aid.However, monodisciplinary approaches ignore the complex systems that generate global health problems and omit a consideration of the strengths and weaknesses of pot