Social Injustice - Solution, Please?

What tell tale indicator will inform us that "social injustice" has been defeated?

If I do $2000 worth of damage to your car, I have reason to believe that paying you $2000 will remedy the wrong I've done. You likely will feel fairly treated once I pay you that amount, not quibbling that the damages were really only worth $1000.

If I've fostered "social injustice", then I'd like to make things better. However, what is it that I am supposed to do achieve that? What, exactly, is the definition of "social injustice"? Whose definition do we use? Mine, yours, or someone else's?

If 95% of white America strove to end "social injustice" but there remained 5% who ignorantly remained hardcore bigots and racists, would "social injustice" be solved? Or, would there still be protests otherwise until 100% come into the fold?

If 95% of minority America came to believe that they were no longer victims of "social injustice" but there remained 5% who will continue to claim real or imagined mistreatment, would "social injustice" be solved? Or, would there still be protests otherwise as we strive to accommodate those who will never accept accommodation?

I simply don't see how protests via kneeling for the national anthem nor blatant statements by wise white men such as Greg Popovich ("The US is an embarrassment to the world") provide any meaningful effort to solve "social injustice".

I declare that I am against the color "RED". I will protest until someone ends "RED".