Answer:
Yes, it was worth the cost. Many industries that once thrived during peacetime had been retooled for war production. When the war was over, governments didn't help factories retool or recalibrate what they used to produce, pushing many industries and factories into financial ruin. In economic terms, the First World War - fought at an estimated cost of $208 billion - caused the most significant global depression of the 20th century. Debts accrued by all major combatants, with the notable exception of the USA, stalked the post-war economic world. Unemployment was rife. Conservative estimates tally World War I casualties at 12 million dead and 20 million severely wounded. In reality, both figures are probably much higher. Including deaths from combat, disease and missing soldiers, each of the major powers had losses in the millions.