MASS Design Group is a design collaborative best known for its sensitive, community-driven approach to architecture, whether for a primary school in Rwanda, a hospital in Liberia after the Ebola outbreak, or a memorial to the victims of lynching in the southern United States. The Boston-based nonprofit calls its design approach “Lo-Fab,” and it has four principles: hire locally, source materials regionally, train where you can, and invest in dignity. During construction of Rwanda's Mubuga Primary School in 2015, for example, 38% of those employed were women, 629 laborers were trained in local fabrication methods, and 83% of materials were sourced from within 10 miles of the site. MASS Design Group was founded in 2010 by architects Alan Ricks and Michael Murphy. Today it works in more than a dozen countries in Africa and the Americas. The collaborative estimates that across its portfolio, 88% of construction costs have been invested regionally and 15,869 jobs have been created.