Despite being easy and inexpensive to treat, a group of common bacterial and parasitic infections kill hundreds of thousands of people in tropical countries each year. In a new paper, Yale SOM’s Teresa Chahine and her co-authors map the complex system of stakeholders surrounding the diseases and identify key leverage points for making progress. Chahine says that philanthropy and aid efforts can actually contribute to the persistence of complex social challenges, and systems thinking allows organizations to target their interventions in the right ways to make an impact.