Putin has complete dominance of Russia but the EU governments are unpopular
Exactly 100 years after the outbreak of World War One, an unlikely source has brought the question of World War Three into the public discourse. David Cameron says Britain will not start World War Three.
Is he joking? Nobody ever thought the unwarlike British prime minister would - or could - do anything of the kind. His country, though still important, is no longer a military giant. But the mere mention of the possibility of the ultimate catastrophe makes us look back at a daunting history and forward to issues which we might prefer to ignore.
For the last two generations we have lived under the shadow, but also under the protection, of nuclear weapons.