How did they maintain order among the passengers and crew?

I agree it could have went that way, but I think it was mostly a story around that main women who oversaw the min/body simulator, which helped those who were frantic and losing it. The movie did show many were struggling and having panic attacks and depression. But it did not show much of homicidal behaviors, just suicidal. Realistically, I think some of the people in charge would have shown more authority. They didn't show any medical facilities or offer any mental care other than the simulation room. People were lining up each day for years until it stopped working. Then people just went crazy, lost faith and checked out. There were so many things they could have touched on but I guess an average length movie didn't have enough time. This concept would make for a good series. That way they could show more of the religious sects, the crime, the crazies, the mental disorders, how people dealt with relationships and adding more children to the chaos, creation of hierarchy besides the lame captain, encounters with meteors or small celestial bodies. There are so many scenarios that would happen with a city of people flying through space, externally and internally.