If we ever do colonize another planet, I'll be leaving a lot behind and not taking a lot with me. Figger on packing two duffle bags and carry on. The dreaded 'three-bag drag, as it were. New beginning and all that. All the grandiose plans I've read on relocating the populace to another planet, I've yet once to read just what the baggage limits are. Or a recommended packing list. This is probably more important than one might think. It will represent what a person carries forward to a new existence.
Structure? What ever happened to the 'citizen of the world movement'? Recall reading about that online a number of years ago where one could declare world citizenship that stood alone from their earthly national citizenship. Wherever man determines to colonize will be a hostile environment far and away differing what one is used to. Lot of the new inhabitants will not adapt. How to deal with that with in whatever the structure? Or perhaps the visionary planners haven't gotten that far yet and are playing by ear?
Man learns much from experience but applies little of it. Volumes exist on how to better life, but it just keeps slogging along in cold mud-filled trenches as it were. What is the old saw? "Only thing man learns from history is that man does not learn from history." So, basically, in my humble opinion, man will take his inherent shortcomings with him to populate yet another planet with the same old same old.
If we ever do colonize another planet, it should be at least a millennium from now. Man is not ready.