Very thoughtful (2-fer) review. Thank you Bill Janeway! Spurs all kinds of questions about remedies. Anti-trust seems like an excellent place to start, but regulating conduct rather than breaking up the behemoths seems like the way to go. And who will lead? I think its much more likely a transnational European effort will have more bite than a US led effort -- even though the companies are US based. Or could, irony or ironies, authoritarian regime in their quest to suppress as the most effective counterweights? Lots Knightian uncertainty here!
Open societies have not always needed defending in the determined way that they do today. But the tide turned against them after the 2008 global financial crisis, and, more than a decade later, the threat posed by authoritarian nationalism continues to rise.