People & Biography - 4 free documentaries about statesmen & revolutionaries.
Start with Mahatma Gandhi – dying for freedom (42 min, DW Documentary), then Fidel Castro: A Psychological Portrait Of A Cuban Revolutionary (44 min, Timeline). All 4 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on statesmen & revolutionaries is The Last Lion by William Manchester.