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Full Idea
Someone impressed by the parallel between tense and modal operators ...might suggest that just as we can speak of places and times forming their own manifolds or spaces, so we can say that worlds are the points of logical space.
Gist of Idea
Possible worlds are points of logical space, rather like other times than our own
Source
Graeme Forbes (The Metaphysics of Modality [1985], 4.2)
Book Ref
Forbes,Graeme: 'The Metaphysics of Modality' [OUP 1985], p.77
A Reaction
I particularly like the notion of worlds being "points of logical space", and am inclined to remove it from this context and embrace it as the correct way to understand possible worlds. We must understand logical or conceptual space.