Besides piling up all kinds of newfangled things, expansions in knowledge also can liberate people from social prejudices.
For centuries, women and other ethnic groups were not fully human. Same-sex attraction & trans people weren't real.
These bigotries are the product of what's often called the "problem of other minds."
Because cognition is inherently private, & language is an only a very partial extrusion of thought, we can't know for sure that other minds are real. https://plus.flux.community/p/renee-good-and-the-problem-of-other