Answer:
Step-by-step explanation:
Did you mean the good war?
No war is good that takes the lives of 85 000 000 people. That number is, I think, a little light. It was found on Wikipedia, but I think it was many more. Search using your favorite search engine. I used "Casualties in WWII by country"
WWII was the bloodiest conflict of our time or any other time. If you claimed it was necessary, I wouldn't argue with that. It was necessary. Europe was devastated by the Nazi War Machine over running the rest of Europe. It took years of rebuilding in both Britain and Germany and Japan among many other (primarily European) countries.