Life in space

I came across another interesting article and wanted to share it with you. John Moore, a UF anthropologist, suggests that deep-space travel be best conducted by families. The idea is that families have the proper authoritative structure and ability to take on a variety of tasks that are required in long term space-travel. Moore said "A starting population of 150 to 180 would best sustain itself at the same rate over six to eight generations, while fitting into the geometric contours of a spacecraft.". However, this situation could create several problems.
To begin, each generation would need to come to terms with the fact that they will live their entire lives on a spacecraft. The only contact with Earth being via media. I wonder if children would rebel against their parents for making this decision for them. But, parents make many decisions every-day which affect their children's lives. And children would not have much choice about their situation in either case.
Furthermore, many freedoms which we take for granted on Earth (or at least America) would need to be governed. Limits on how many children a couple can have, what sex children should be, who can marry, and equal allocation of resources are all key to a succesfull mission.
Another complication which is brought up in the column is how morals are maintained. If someone decided to become king and enslave the rest of the spacecraft it would be impossible for people back on Earth to do anything about it. Would the interdependence on each other for survival help keep order or would a very strict military like order need to be maintained? Could any system be maintained over several generations to successfully complete the mission?