Exactly, like in my area (Las Vegas) the police force literally owns a tank now, has a huge swat force, and is super on edge about everything. Like they shoot dogs very regularly. You have to keep your dog away from them and if it does get near them you have to heavily control it and warn the officer as much as possible not to shoot the dog. There are also pretty regular human shootings, tazings, and macing, but when you look at the numbers the races actually get equal brutality. So they constsntyl kill and hurt people but it's all in a very non-bigoted way.
Like personally, when I hear stories of police brutality on the news I don't think of race, I think of police using unnecessary force. Unless race is explicitly involved I don't notice it. Sure some of the cops who do this might be internally racist or something, there's no denying that. Black people get charged for crimes, arrested, and overall checked by cops more than white people, but as I said when I see brutality and such I view it as mitarization we need to cut down like Lisa pointed out.
And on the thread's main topic, as everyone said there is nothing to be done. The UN is weak and powerless even with the US so without them there would be no way. If the US decided to become imperialist again no one could do anything. The US has the power to destroy the world at this point. Sure they'd be stopped before they could destroy everything but they wouldn't leave much left. It's up to US citizens to make this changes and things internally. That is the way we control the US. Sure it's shaky but it's democracy and it's all we have. That's why voting matters.