In reality, a single individual cant. But by finding a few dozen similar individuals who want similar things, one can very easily ‘create a message, and stay on message’.

Moms against drunk driving were profoundly effective.

You cannot fix the police problem.
You cannot fix the ‘white’ issue.

The reason being that they have nothing to do with police or being white, but with the attainment of majority political power, and the ability to seek rents by doing so.

in other words, you cannot create rational incentives under democracy.

Democracy is just the slow road to despotic communism.

We knew that 2300 years ago. We know it now.

https://www.quora.com/How-can-a-single-individual-change-widely-held-beliefs-or-trends-like-biases-against-certain-professions-cops-or-groups-of-people-whites