Scott Alexander sees the idea of cultural evolution idea as a bit too optimistic:
Like, there’s a perspective where lots of countries have a King, because societies that have a single central nexus to their coordination structure are able to coordinate better than ones that don’t, and having them rule for life promotes long-term thinking, and them be hereditary provides a clear Schelling Point for secession disputes that prevents civil war and cleverly ensures that the previous ruler is incentivized to promote the peaceful transfer of power to the next one, and this is why constitutional monarchies have slightly higher yearly GDP growth than other forms of government.
And there’s another perspective where lots of countries have a King, because some guy seized so much power that he can live in a giant palace and order people around all day instead of doing work. And if anyone tries to prevent him from doing that, he can arrange to have that person beheaded.
Legal Systems Very Different From Ours is very much part of the first perspective. It’s a story of nations and legal systems evolving towards ever-more-optimal and ever-more-efficient institutions for the good of all, and it presents strong evidence supporting that story. I can’t disagree with its evidence from within its narrative, but I still wonder how much to worry about this alternate way of looking at things.
I’m glad you enjoyed Scott’s comments on my book. Note that the draft he linked to is from about five years ago. The current draft, also on my web page, is at:
http://www.daviddfriedman.com/Legal%20Systems/LegalSystemsContents.htm