Dead Orbit believes the humans should spread out around the solar system, so if the darkness returns we can't all be killed and gone extinct in one swoop and will still have a shot at survival. Future War Cult believes we just need a lot of weapons to fight off the darkness. You know the thing that ended the Golden age and almost killed everyone. New Monarchy just wants to build a new and kinder government for the city. I like Dead Orbits ideals the best. Keeping everyone in one single spot seems like easy killings for the darkness.