Sense and existence, the main work of Markus Gabriel, addresses the issue of the validity and limits of ontology and metaphysics with an extraordinary knowledge of both the history of philosophy and the modern theory of science. Modern ontology, since Kant, has familiarized us with the idea that "existence" is not a concept that contributes to determining the properties of an object. But if existence (being) is not a property of the object, what is it? Markus Gabriel confronts this problem with his ontology of the fields of meaning, the thesis inherent in a radical «ontological pluralism». The author starts from the pre-ethical experience of a plurality of fields of meaning and rejects the idea of ​​a totality in which the various fields of objects are inserted, together with the oceanic feeling of unity with it. That unit is supplanted by a transfinite proliferation of fields of meaning. Said with all brevity, in Sense and existence Gabriel denies that there is a unitary world, a world that we can present in an "image" or capture in an "intuition". This opens up cracks in concepts such as "order of the world", "universe", "science in general" and even "reason".