A speculative turn or a return to the sources of thinking? About the “quartets” by Martin Heidegger and Graham Harman

The article contains reflections on the “speculative realism”, a direction in 21st century philosophy initiated by Graham Harman, whose books (The Quadruple Object, Object-Oriented Ontology. A New Theory of Everything) continue and process Martin Heidegger’s concept of “the quadruple” (das Geviert), and they also use the ideas of such thinkers as Edmund Husserl and Bruno Latour. The basic problem formulated in this text arises from the following questions: is speculative realism another turn in scientific research, or rather a return to those sources of thinking that take into account the complexity and the irreducibility of reality to any metaphysical instance? What is the role of the “speculative turn” in cultural studies, in various interpretative practices