Industrialization affected the war because everyone was mass producing weapons and amo and other things getting ready for war to show off their new assets and how evolved they are to each other and the world. And other things affected WW1 but this by far affected it the most because if the Europeans powers had not been building up their armies and making new weapons trying to be more advanced than each other then WW1 wouldn't have been as bloody and bad as it was if we had not been mass producing everything and making new weapons and trying to have the biggest armies. The war probably wouldn't have been as bad as it was.