+When people need to coordinate on making the _same_ arbitrary choice, they tend to converge on whatever option is (for whatever reason) most salient. This is the concept of a "Schelling point", after famed economist Thomas Schelling, who posed the question of where strangers should attempt to meet in New York, if they couldn't communicate to pick a rendezvous point in advance. The plurality answer turns out to be "noon at the information booth at Grand Central Station", not because of any properties that make it an objectively superior meeting place that you would pick even if you _could_ communicate in advance, but just because its centrality makes it the focus of reasonable mutual expectations about what your partner is likely to do.
+
+Schelling points are "sticky."
+
+https://www.lesswrong.com/posts/Kbm6QnJv9dgWsPHQP/schelling-fences-on-slippery-slopes
+
+[distinguish between "identity" as the Schelling _dimension_ (age rather than maturity), and also the slippery slope on rights (if pronoun, why not bathroom; if bathroom, by not sports?)]