“If we want to know what American normality is — i.e. what Americans want to regard as normal — we can trust television,” David Foster Wallace once wrote. Can we? It’s a chicken-or-egg situation. Does television teach us what’s normal? Or does it only absorb new social realities after a quorum of Americans has gotten on board? Certainly a number of recent shows have taken it upon themselves to educate and enlighten their audiences, with story lines about everyday sexism (Master of None), racial profiling (The Carmichael Show), and the experience of undocumented immigrants (Jane the Virgin). These moral tales tend…