Blackfish

Gabriela Cowperthwaite's 2013 film about Tilikum, a captive orca who killed three people at SeaWorld, single-handedly tanked SeaWorld's stock price by 33% and ended their orca breeding program forever. Musical acts cancelled performances. Attendance plummeted. It's the rare documentary that didn't just expose a problem — it actually, measurably destroyed the industry it targeted. Corporate accountability via cinema.