In season 4 of The Last Archive, host Ben Naddaff-Hafrey digs into the history of truth in 20th century America. These six stories trace a history of how we know what we know, and why it seems sometimes lately as if we don’t know anything at all. Through gripping narratives about the history of automation, the forgotten origins of social network theory, invasive species panics, freelance wiretappers, sci-fi family histories, and time travel, The Last Archive Season 4 is a thrilling look at the history of knowledge.