And long-term human settlement will follow at some point, mainly to develop mineral and energy resources available on the Moon, but also to emplace protective systems aimed at avoiding large asteroid impacts of the type we were all recently made aware with that grazing meteor strike in Chelyabinsk and the simultaneous near-miss by big-rock DA14.
Though the formula cannot be boiled down to just a few elements, one of the keys to being able to offer that type of intuitive experience is to make something that is natural and consistent, avoiding surprises.