the centralisation of human knowledge in the servers of a small number of firms – from Amazon’s e-book system to the servers of the major news organisations – takes us, in some sense, back to the 15th century. It’s also easier for the authorities to observe the transmission of disapproved material, as they can monitor electronic communications more easily than physical packages (Ross Anderson, "#SecurityEngineering — Third Edition", PDF-Preview 2020-05-16)