Catalan inventor Narcís Monturiol fought for ideals like equality, freedom, and progress in the midst of a lot of social and political chaos in 19th-century upheavals in Spain and Catalonia. And then, he built submarines.
Research:

SYMHC Classics: Pueblo Revolt
24:21

Behind the Scenes Minis: Coffee, 'Pirats' and Sea Robbers
30:36

Francisco Menéndez & Fort Mose
37:57