Carolyn Stephenson, Erika Simpson, and Nathan Funk all are professors of peace studies. They discuss the declining numbers of university programs in peace and the impact the movement had in academia.

Yes, we must curb greenhouse gas emissions, but nature also has other ways of cooling the planet. Rob de Laet reminds of an overlooked one: evapotranspiration of water and aerosols into the air.

Lloyd Axworthy, Michael Beer, Douglas Roche, and Doug Saunders discuss what to do if your ruler is a madman who appoints his horse to the senate or prepares to end a civilization.