In its more than 30 year history, the John D. and Catherine T. MacArthur Foundation has given more than $5 billion to "defend human rights, advance global conservation and security, make cities better places, and understand how technology is affecting children and society." Along the way the foundation has helped produce a tremendous amount of knowledge in a range of fields. The What We're Learning section of the Foundation's website offers reports, articles, and summaries of some of that knowledge. On the site, readers may scout the resources, which are published about once a week. Articles include treatments of such topics as aging successfully, state spending on substance use disorders, police treatment of Nigerian widows, protecting journalists in Mexico, and many more.