100 Years of Unrest is an interactive map that has:

tried to gather information on social unrest throghout last century. Protests, uprisings, rebellions and revolts, civil wars, wars for independence, revolutions were mapped. Mapping events in time has enabled to follow hotspots or temporal trends of civil disobedience across the globe.

It’s based on information from Wikipedia.

Thanks to Google Maps Mania for the tip.