Full Idea
Any possible world, and hence, of course, this one, is completely constituted by its tropes and connections of location and similarity.
Gist of Idea
A world is completely constituted by its tropes and their connections
Source
Donald C. Williams (On the Elements of Being: I [1953], p.116)
Book Reference
'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.116
A Reaction
Note that Williams regularly referred to possible worlds in 1953. This is a full-blooded trope theory, which asserts that objects are bundles of tropes, so that both particulars and universals are ontologically taken care of.