Full Idea
The 'objectual modal realist' holds that what makes modal beliefs true are certain modal objects, typically 'possible worlds'. ..The 'non-objectual modal realist' says modal judgements are made true by how things stand with respect to this world.
Gist of Idea
Objectual modal realists believe in possible worlds; non-objectual ones rest it on the actual world
Source
Ian McFetridge (Logical Necessity: Some Issues [1986], §2)
Book Reference
-: 'Aristotelian Society' [], p.141
A Reaction
I am an enthusiastic 'non-objectual modal realist'. I accept the argument that real possible worlds have no relevance to the actual world, and explain nothing (see Jubien). The possibilities reside in the 'powers' of this world. See Molnar on powers.