Like fundamentalist Judaism and medieval Christianity, Islam is totalist. That is to say, it makes a total claim on the individual.
The Universe is a pretty big place. . . And the one thing I know about nature is it hates to waste anything. So I guess I'd say if it is just us, an awful lot of space is going to waste. The earth is not alone, it is not like a single apple on a tree; there are many apples on the tree, and there are many trees in the orchard.