Before I delay my reply until I’ve read everything you’ve linked, I’ll rather post a WIP reply.

Thanks for all the data! I hope I’ll have time to look into Open Borders some more in August.

Error theorists would say that the blog post “Effective Altruists are Cute but Wrong” is cute but wrong, but more generally the idea of using PageRank for morality is beautifully elegant (but beautifully elegant things have often turned out imperfect in practice in my experience). I still have to read the rest of the blog post though.