America’s Constitution was meant to unify the new nation and help avert a civil war over the thorniest of divisions: slavery. Oops! In retrospect, that charter proved much too ambiguous, lending itself to both proslavery and abolitionist causes.
In this season’s premiere, historian Liz Varon discusses the deep roots of polarization in the United States — with Will, Siva and an auditorium full of their students. The Union may have survived, Varon says, but its bloodiest war still echoes.





















Lorraine Marquez Eiler’s photo of her great-great grandparents and her great-grandparents, who would walk about 50 miles through the Sonoran Desert to the springs.
Construction equipment is seen near the U.S.-Mexico border just west of the Lukeville port of entry on Monday, Aug. 24, 2026. Credit: Stephanie Casanova
Rep. Adelita Grijalva, left, and Tohono O’odham Chairman Verlon Jose listen as Lorraine Marquez Eiler, a Hia-C’ed O’odham elder, shares how her ancestors would hold ceremonies at Quitobaquito Springs. Grijalva visited the springs with tribal leaders on Monday, Aug. 24, 2026. Credit: Stephanie Casanova
Sara Mae Williams, Justice of the Peace in Ajo and a Tohono O’odham citizen, shares their concerns regarding border wall construction on Tohono O’odham land at a town hall at the Ajo Plaza Rec Hall on Monday, Aug. 24, 2026. Credit: Stephanie Casanova