Full Idea
The principle of 'maximalism' is that for every truth, then there must be something in the world that makes it true.
Gist of Idea
'Maximalism' says every truth has an actual truthmaker
Source
Fraser MacBride (Truthmakers [2013], 2.1)
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.11
A Reaction
That seems to mean that no truths can be uttered about anything which is not in the world. If I say 'pigs might have flown', that isn't about the modal profile of actual pigs, it is about what might have resulted from that profile.