Economic history is not politically correct. Many on the left therefore struggle with its findings. - Niall Ferguson

I disbelieve in both cycles of history and ends of history. History is the interaction of many complex systems. There are certain long-run processes (notably exponential gains in productivity through the development of technology and the “suprasecular” decline of nominal and real interest rates as a result of capital accumulation) punctuated by, well, one disaster after another. These disasters are either randomly distributed or follow a power law (i.e. there are lots of little earthquakes, pandemics or wars, but a few cataclysmic ones). At unpredictable intervals, the global system is tipped into a major transition by a disturbance that can be quite small, if not quite as small as Edward Lorenz’s famous butterfly in the Amazon setting off a tornado in Texas. Russia’s war in Ukraine — destructive certainly, but still a relatively small conflict by 20th-century standards — can be enough to trigger a “conflict avalanche.”

Like the Roman Empire in the early fifth century, Europe has allowed its defenses to crumble. As its wealth has grown, so its military prowess has shrunk, along with its self-belief. It has grown decadent in its shopping malls and sports stadiums. At the same time, it has opened its gates to outsiders who have coveted its wealth without renouncing their ancestral faith.

The First World War was at once piteous, in the poet's sense, and 'a pity'. It was something worse than a tragedy, which is ultimately something we are taught by the theatre to regard as unavoidable. It was nothing less than the greatest error of modern history.