Went to see "Eve of War" (spoilers included)

I went to see "Eve of War" and it was interesting! (though a bit difficult) It's a story based on a true event, about brilliant young people who gathered to research war and discovered they would be utterly defeated in four months. I thought it was amazing that people back then figured that out. However, knowing it didn't change the country's policy, and even the top leaders knew it but couldn't back down without facing immense criticism, I wondered what the right decision was.