Full Idea
My preferred view is that there is only one fundamental entity - the whole concrete cosmos - from which all else exists by abstraction.
Gist of Idea
The cosmos is the only fundamental entity, from which all else exists by abstraction
Source
Jonathan Schaffer (On What Grounds What [2009], 2.1)
Book Reference
'Metametaphysics', ed/tr. Chalmers/Manley/Wasserman [OUP 2009], p.361
A Reaction
This looks to me like weak anti-realism - that there are no natural 'joints' in nature - but I don't think Schaffer intends that. I take the joints to be fundamentals, which necessitates that the cosmos has parts. His 'abstraction' is clearly a process.