 Other approaches reject any ordering or hierarchy of entities altogether. Some views deny that the sciences can be divided into hierarchies, but allow that certain entities are composed of others. A more radical view is that there is no building at all among entities. A prominent example is Actor-Network Theory (Latour 2005, Callon 1999, Law 2009). All entities, in this approach, are potentially on a par with one another. Even identifying an entity or a class of things as “social” is a mistake, according to Latour. Latour distinguishes certain roles that objects can play: they can act as “mediators”, transforming meaning, and they can act as “intermediaries”, transmitting meaning without transforming it. An atom, a person, a machine, a mountain, or a bank, have equal potential to play these roles. All the scientist—social or natural—can do is to write narratives that trace associations. Other approaches to flat ontology include “assemblage theory” (DeLanda 2006), “object-oriented ontology” (Harman 2005), and “scale-free metaphysics” (Thalos 2013).