Bernie Sanders is the leading edge of the historical forces bringing the 40-year Reagan era to an end, says Richard Parker of Harvard’s Kennedy School.

Plus: Obama’s legacy for black America is mostly symbolic, Gary Younge argues—the wealth gap between black and white Americans has grown over the last eight years, along with black poverty. Gary writes for The Guardian and The Nation.

Also: the real politics of hope—Rebecca Solnit talks about untold histories and wild possibilities—her new book is Hope in the Dark.

Subscribe on iTunes, Stitcher, and SoundCloud for new episodes each Thursday.