A special episode from our friends at NPR's history podcast Throughline: Octavia Butler's alternate realities and 'speculative fiction' reveal striking, and often devastating parallels to the world we live in today. She was a deep observer of the human condition, perplexed and inspired by our propensity towards self-destruction. But along with her warning is her message of hope - a hope conjured by centuries of survival and persistence. For every society that perishes in her books comes a story of rebuilding, of repair.