Surely someone has already pointed out this, but I have not seen such indications. It seems that humanism follows science, because the idea of progress shows that everyone can win, there is enough for everyone, life is not a zero-sum game, where if you do not harm someone, then you yourself live worse. And the lack of discrimination probably comes from the greater consistency of your reasoning, you see that hating a certain group is a completely arbitrary thing that has nothing to do with it, and just as you could hate any other group. It can be said that you are aware that you cannot be said to be special just because you are, because everyone else may think the same, you have no special reason.
Surely someone has already pointed out this, but I have not seen such indications. It seems that humanism follows science, because the idea of progress shows that everyone can win, there is enough for everyone, life is not a zero-sum game, where if you do not harm someone, then you yourself live worse. And the lack of discrimination probably comes from the greater consistency of your reasoning, you see that hating a certain group is a completely arbitrary thing that has nothing to do with it, and just as you could hate any other group. It can be said that you are aware that you cannot be said to be special just because you are, because everyone else may think the same, you have no special reason.