Why is morale so important? This is not a population that can vote on its feet. When there is a problem, one of two things will happen: the problem will get solved, or the situation is going to escalate. Using history as a guide, when situations escalate far enough, people have a tendency to break things and murder other people.

On a vessel that is engineered to the cubic meter of fuel, and where we obsess about whether we need 11 or 12 children born in a given year to keep the population stable, warfare on board is very, very, very bad. There isn't a lot that can break without leading to a collapse of the engineering systems. And there aren't a lot of people you can kill before you impact the population's ability to keep those engineering systems running.

I could describe 100 ways for things to break down. But that is not the challenge here. The challenge is to make all of this actually work. What if we got to the end of this story, and instead of some sort of murderous computer, or a faceless corporation, or Lovecraftian horror of an alien I presented the scariest foe humanity has ever run up against: the future.

*** YOU HAVE DIED                           ***
*** ... OF OLD AGE ...                      ***
***  MISSION :-)                            ***