Neo-Aristotelianism is a philosophical framework that has increasingly been developed in the last two decades. Its central topic is the employment of the notions of grounding, essence and truth-making in order to explain ontological dependence and truth. This thesis is about the main aspects and problems of these notions. The chapters of which it is composed can be divided into two parts. The first two are about the meta-metaphysical framework. We will first introduce Carnapian deflationism and neo-Aristotelianism. The aim is to make their main features explicit and to explain how Carnapian deflationism can deal better with the role of existence and the scope of metaphysics. In particular, we will focus on Thomasson’s easy ontology. The oth...