I don't know if you are asking SmoT or me, but I wouldn't dismiss that situation as immoral or impossible a priori. However, I do think there should be a cut off point somewhere, and 5 women and 1 man is pushing it, IMO. Of course, a cut off point would be somewhat arbitrary, though perhaps some studies could examine what exactly the limits are for such families actually working. A man and a wife with 4 kids seem to have enough love and patience for each other to make things work. Of course, that is a different situation, but I do think it indicates that by simply adding a person or two you do not automatically make a situation unlivable. If different people accepted roles within the family, that would make it easiest, though obviously the roles would have to be not only accepted by the people, but I think a natural part of who they are. E.g., some people are naturally workaholics, other stay at home moms, etc. Having 4 workaholics in a family who have completely different political, religious, and social beliefs and practices, and completely different ideas about raising children, how to spend recreational time, etc. is just a recipe for disaster, just as it would also often be in a monogamous relationship.