>>Attain+H21
Protesting can have a lasting effect. There are small changes happening all over the country already. In my city, the mayor has requested a total overhaul of the police use of force policy within 14 days. In another city, the mayor (who doesn't control the local police for weird reasons) has called an out-of-cycle meeting of the police board to address poor behavior by officers during the protests and to change policies. Over the past couple of nights, lots of cities have changed how they deal with large protests, backing off; its too soon to know if those tactical changes will revert in a week, a year, a month, or at all.
At the federal level, there are a few bills being introduced to deal with qualified immunity or other aspects that need addressing. These may not go anywhere, but more pressure may have an effect on that. Also, hopefully next time there's a massive economic downturn, officials remember that not supporting individuals makes the whole nation a powder keg, ready to spawn riots in all 50 states.
There's also historic precedent that protesting has a lasting change.