One Drop

The problem isn't that no one raindrop feels responsible for the flood; it's that no one raindrop believes that its absence would have made things better.

I understand the idea that the choices that individual people make aren't particularly important, and that social systems need to change in order for certain segments of the population to experience justice. But I think that this attitude, while well-intentioned, leads people to think that their own contributions to how the world works are too small to be at all important. But what is a system other than the actions of a group of people over time?