This is a good examination of one of the things that makes Star Trek VI: The Undiscovered Country great. While The Wrath of Khan gets most of the attention, I would argue that several of the other movies, particularly The Undiscovered Country and Generations, have a more powerful message:
https://www.slashfilm.com/1163073/star-trek-vi-is-a-perfect-tale-of-how-idealists-grow-conservative/