Riots, protest, the brutuality has always occured, the difference is the current technology. It provides the ability to capture black injustices ad puts the world on a pedal stool to invoke change.
As Bill Clinton entered office, he exceeded the tough on crime persona of his predecessors. He builds an infrastructure allowing for brutality, preverse incentives, and abuse by law enforcement with his 1994 crime bill.
The Doctor realizes the reason why his future self gave River Song his sonic screwdriver. He uses it to save her and the people trapped in the library.
The Supreme Court announces rulings that can change how certain social issues are viewed. With the checks and balances, the Supreme Court upholds the judicial branch, ensuring fair rulings and legislation.