I don’t always agree with him, but I love Graham Harman for his daring and style. While I’m open to following tangents where they lead, I suggest starting with Harman’s Heidegger.
Tool-Being, which you can look at here, is a great source to have on hand.
What’s it all about ?
The key to my argument lies in a fresh reading of the famed tool-analysis of Being and Time. Although hundreds of scholars have already commented on this masterful analysis, I am not aware of any who have drawn sufficiently radical conclusions from it. Of the few interpreters who have been willing to give center stage to the drama of tool-being, all have followed Heidegger too closely in regarding human Dasein as the biggest star in the theater. The tool-analysis is read as the triumph either of practical activity over theoretical abstraction, or of the network of linguistic signs over the ever unpopular “things in themselves.” Such readings of Heidegger prevail among both analytic and continental philosophers. Against these standard readings, I claim that the tool-analysis is neither a theory of language and human praxis, nor a phenomenology of a small number of useful devices called "tools. " Instead, Heidegger’s account of equipment gives birth to an ontology of objects themselves.
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Contrary to the usual view, tool-being does not describe objects insofar as they are handy implements employed for human purposes. Quite the contrary: readiness-to-hand (Zuhandenheit) refers to objects insofar as they withdraw from human view into a dark subterranean reality that never becomes present to practical action any more than it does to theoretical awareness.
I connect this to Plato’s “ideas” and Kant’s “things-in-themselves.” The “identity” of the object is a grip on something that mostly lives in the darkness.
Harman goes further than I’m willing to follow him personally, but here’s where he goes:
But my argument goes another step further. When the things withdraw from presence into their dark subterranean reality, they distance themselves not only from human beings, but from each other as well. If the human perception of a house or tree is forever haunted by some hidden surplus in the things that never becomes present, the same is true of the sheer causal interaction between rocks or raindrops. Even inanimate things only unlock each other’s realities to a minimal extent, reducing one another to caricatures. It will be shown that, even if rocks are not sentient creatures, they never encounter one another in their deepest being, but only as present-at-hand; it is only Heidegger’s confusion of two distinct senses of the as-structure that prevents this strange result from being accepted.
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But this means that, contrary to the dominant assumption of philosophy since Kant, the true chasm in ontology lies not between humans and the world, but between objects and relations. Moreover, this duality holds equally true for all entities in the cosmos, whether natural, artificial, organic, or fully human. If we read Heidegger’s tool-analysis in the right way, the lingering priority of Dasein in his philosophy is vaporized, and we encounter a strange new world filled with shocking possibilities for twenty-first-century philosophy. Certainly, Heidegger deals yet another mortal wound to metaphysics of the old -fashioned kind, the kind that is slapped and pummeled still further by Derrida, Wittgenstein, and others. But by the same stroke, he unknowingly suggests a possible campaign of guerilla metaphysics.
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Tool-beings turn out to be a strange variant of traditional substances, though they are as irreducible to physical particles as they are to the traces they leave in human perception. They are substances that exceed every relation into which they might enter, without being ultimate pieces of tiny matter. But this leaves only one possibility: for the first time in a long while, Heidegger pushes philosophy to the point where it has no choice but to offer a renewed theory of substantial forms.
The real meaning of “fundamental ontology” is not that Heidegger privileged human Dasein at some provisional early stage of his career before later repenting his error. What this term really means is that all concreteness collapses for Heidegger into a single obsessive fundament, a black hole of ontology whose gravity is so powerful that no recognizable entities ever escape it. As long as we take his numerous specific topics at face value, we will not grasp the utter philosophic desolation wrought by his assault on the “ontic” realm.
What sense do you make of this ? We might also discuss this gesture, not so uncommon, of twisting a famous philosopher into new shapes.