The fall of civilizations - it tells the story of the rise and fall of different groups of people through history. Often with readings in the original tongue.
From the same creator “vaccine” is the history of the creation of the works first vaccines. Neither podcast has any ads which is awesome.
Lastly factually with Adam conover is great. Comedian discussing often political issues.
They have an absolute classic piece of Canadiana on there https://www.nfb.ca/film/log_drivers_waltz/