During world war 1, how did war-focused economies change the way industry operated

Since World War I was a "total" war, this meant that entire economies and industries of nations were mobilized to help the war effort--meaning that factory production turned towards things like making tanks and weapons, instead of "regular" items. 

Spread knowledge of agriculture to humans around the worldprevented human development of language and other ideaswas not a part of human life until only the last 2,000 yearsencouraged most human groups to maintain a nomadic life