Full Idea
Lewis-style modal realism eliminates all real possibility since on his account everything is actual relative to its own world.
Gist of Idea
For Lewis there is no real possibility, since all possibilities are actual
Source
comment on David Lewis (On the Plurality of Worlds [1986]) by David S. Oderberg - Real Essentialism 6.2
Book Reference
Oderberg,David S.: 'Real Essentialism' [Routledge 2009], p.127
A Reaction
Since it is possible for me to be in New York and in Chicago, but not both at once, his possibilities have to be kept apart, even though they are actual. I expect my visit to Chicago to remain as only a possibility.