  Mally’s first work on Meinong’s theory of objects is the published version of his dissertation (Mally 1904). His own, mature theory of objects can be found in the published version of his Habilitation thesis (Mally 1912). (For a detailed comparison of the two theories, see Poli 1998.) Mally addressed the topic also in his later works, taking a critical point of view with respect to Meinong’s as well as his own theory (Mally 1935, 1938b, 1971). Since Mally’s theory of objects is one of his most interesting and most influential contributions to philosophy, we want to provide a more detailed account of the theory itself as well as of the problems it seems to be able to solve, in the following section.