The First World War started on 4th August 1914. It's too early to say what its consequences were.
There's a trend among historians to say the war was not as bad as it was depicted by poets like Wilfred Owen and Siegfried Sassoon (who fought in it) and that a longer, more strategic view of the war is needed. They say we haven't taken the long view. I don't think these people's 'long-view' is long enough.
Please also see my poems "Mrs MacDonald Visits Her Father", and "General Freyberg's Wounds".