I think that ‘Star Trek - The Next Generation’ covered this very dilemma with (S2E18) Up The Long Ladder. …The one where the crew execute the clones that Planet A were making of them to make up for their lack of genetic diversity, and forced them to marry into Planet Ireland instead?
Pale Lights, an ongoing web serial set in the pistols-and-sabres era. The first book’s already out for you to read! The author previously wrote A Practical Guide to Evil, which is completely finished.