Princeton University

Some anxieties are essential, and for millennia they kept our ancestors alive. But there's another type of anxiety that we can actually do away with—and it's defeated via hope.

Despite decades of research, there is no reliable vaccine for malaria. Dr. Philip Eckhoff lays out the strategies and collaborations required to eradicate this disease and the half a million lives it takes each year.

Princeton professor Sean Wilentz explains why America has such a staunch two-party system, which was never part of the Framers' plan.