As a documentary connoisseur, there are about 20 recommendations I could think of, but I'll give you my top 3:
Tickled: Less of a "global problem" issue in and if itself, this is nonetheless expository of our time. Top rec.
Corked: there is no meritocracy.
Plastic China: Arguably the most important documentary film ever made in terms of impact on global policy/affairs
Corked: there is no meritocracy.
Plastic China: Arguably the most important documentary film ever made in terms of impact on global policy/affairs