Full Idea
The actual universe is the collection of the possibles which forms the richest composite.
Gist of Idea
The actual universe is the richest composite of what is possible
Source
Gottfried Leibniz (Exigency to Exist in Essences [1690], p.92)
Book Reference
Leibniz,Gottfried: 'Leibniz Selections', ed/tr. Wiener,Philip P. [Scribners 1951], p.92
A Reaction
'Richest' for Leibniz means a maximum combination of existence, order and variety. It's rather like picking the best starting team from a squad of footballers.