This brittanica article summarizes the general concepts: https://www.britannica.com/topic/dialect/Social-dialects https://www.britannica.com/topic/dialect/Soci

This brittanica article summarizes the general concepts: https://www.britannica.com/topic/dialect/Social-dialects https://www.britannica.com/topic/dialect/Social-dialects These 2 papers are more at the language level rather than the dialect level, but acts as a good jumping-off point for research and ideas about how social structure affects the development/evolution of language: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5805949/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5805949/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2798932/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2798932/ Neither specifically address the development of dialects as a reinforcement of social subgroup differentiation, and right now I can't find the original place where I read about this idea.