I remember reading about this topic in philosophy class, namely, the Pessimistic Induction [1]. I've wondered if a similar argument could be made for moral progress. Certainly, many people are quick to make similarly skeptical arguments which point out that people in the past had different moral views than we do now, and no less confidence that they were right. If we were to survey the history of moral conventions, would we find that it converges in the same way as our scientific theories? (Does the arc of history bend toward justice?)

[1] https://plato.stanford.edu/entries/scientific-realism/#PessI...