One day if we'll have the explicit formula for human Coherent Extrapolated Volition, it may become possible to measure one's impact on the society on a single scale. Until then, there is no such thing as a scalar "a.impactOnSociety(time)".
Also: there are many sources of evidence about a person. Some people stop immediately after taking one piece of evidence (such as race) into account, even if there are other pieces available. Of course such motivated thinking is a mistake separate from mere "using evidence about people / groups".
This sort of thinking seems bad:
This sort of thinking seems socially frowned upon, but accurate:
Similar points could be made by replacing a/b with [group of people]. I think it's terrible to say something like:
But to me, it doesn't seem wrong to say something like:
Credit and accountability seem like good things to me, and so I want to live in a world where people/groups receive credit for good qualities, and are held accountable for bad qualities.
I'm not sure though. I could see that there are unintended consequences of such a world. For example, such "score keeping" could lead to contentiousness. And perhaps it's just something that we as a society (to generalize) can't handle, and thus shouldn't keep score.