In reply to ablackett:
Dan Carlin's "Blueprint For Armageddon" - a wall to wall history of WWI, six x 4-6hr episodes.
Martyrmade Podcast - https://www.martyrmade.com/topics/martyrmade-podcast/, has a great Mai Lai episode followed by the God's Socialist episodes. The later are hours long and, while ostensibly an analysis of The People's Temple mass-suicide, it's really a treatise on America in the 60s, 70s, 80s, covering everything from race and poverty, to helplessness and religion, to politics and terrorism. The picture painted of several decades in US history is unusually vibrant.