The First World War was a tragic and unnecessary conflict. Unnecessary because the train of events that led to its outbreak might have been broken at… - John Keegan

The basic and stark fact, nevertheless, was that the conditions of warfare between 1914 and 1918 predisposed towards slaughter and that only an entirely different technology, one not available until a generation later, could have averted such an outcome.
The first day of the battle of the Somme, 1 July 1916, was to be an awful demonstration of that truth.

It is one of the many graveyards which are the Great War’s chief heritage. The chronicle of its battles provides the dreariest literature in military history; no brave trumpets sound in memory for the drab millions who plodded to death on the featureless planes of Picardy and Poland; no litanies are sung for the leaders who coaxed them to slaughter. The legacy of the war’s political outcome scarcely bears contemplation: Europe ruined as a centre of world civilisation, Christian kingdoms transformed through defeat into godless tyrannies, Bolshevik or Nazi, the superficial difference between their ideologies counting not at all in their cruelty to common and decent folk. All that was worst in the century which the First World War had opened, the deliberate starvation of peasant enemies of the people by provinces, the extermination of racial outcasts, the persecution of ideology’s intellectual and cultural hate-objects, the massacre of ethnic minorities, the extinction of small national sovereignties, the destruction of parliaments and the elevation of commissars, gauleiters and warlords to power over voiceless millions, had its origins in the chaos it left behind. Of that, at the end of the century, little thankfully is left. Europe is once again, as it was in 1900, prosperous, peaceful and a power for good in the world.

Within fifteen years of the war’s end, totalitarianism, a new word for a system that rejected the liberalism and constitutionalism which had inspired European politics since the eclipse of monarchy in 1789, was almost everywhere on the rise. Totalitarianism was the political continuation of war by other means.