Airs January 14, 2018, at 6 p.m. Do conservative or liberal philosophies lead to more just outcomes? Opposing moral philosophies have long fueled debate about America’s policy goals and national identity. In today’s divisive political arena, which side best embodies the nation’s most cherished virtues? Morally speaking, is the left right? The debaters are Howard Dean, David Brooks, Melissa Harris-Perry, and Robert George.