Journalist Max Hastings thinks the first world war was a "necessary war". Historian Niall Ferguson says Britain should have kept out of it. The BBC's idea of a big debate was to give each a documentary to make their case.
We must not forget those ridiculed, jailed and worse in the first world war for daring to fight for peace
Fighting for peace earned you anything from vitriolic accusations of cowardice and treachery to job loss, state-abetted mob attacks, arrest, imprisonment, hard labour, courts-martial, show trials and even execution orders.
Jeremy Clarke says we must remember the real World War One – the war that was an unmitigated catastrophe whose price was paid by ordinary people on both sides.
The present production is against a different backdrop of wars, and speaks to a new generation, but does so powerfully, says Lindsey German.
The First World War had little or nothing to do with the defence of "western civilization", "liberal values" or democracy, it was at root a war of inter-imperialist rivalry
Conscientious objectors in World War One were "cranks" says BBC's Jeremy Paxman for refusing to kill and be killed in a war that left 20 million dead.