Graham Harman’s object-oriented philosophy is often incorrectly associated with the movement of Speculative Realism, when in fact it is the exact opposite. OOP’s invisible, untouchable, unknowable real objects are mere dogmatic posits, abstractions asserted to exist behind the veil of withdrawal. Like a vampire, OOP has profited from the interest that has grown up around the themes of speculation, ontology, pluralism, and realism in recent Continental Philosophy. These themes were appropriated and codified under the appellation “Speculative Realism”, and OOP has tried to slip into the movement under false pretences. Harman’s brand of OOO is best described as stipulative idealism.
For details see my essay MORE MONIST IDEALISM.