  Bohm and Bell's approaches to the foundations of quantum mechanics share
notable features with the contemporary Primitive Ontology perspective and
Esfeld and Deckert minimalist ontology. For instance, all these programs
consider ontological clarity a necessary condition to be met by every
theoretical framework, promote scientific realism also in the quantum domain
and strengthen the explanatory power of quantum theory. However, these
approaches remarkably diverge from one another, since they employ different
metaphysical principles leading to conflicting Weltanschaaungen. The principal
aim of this essay is to spell out the relations as well as the main differences
existing among such programs, which unfortunately remain often unnoticed in
literature. Indeed, it is not uncommon to see Bell's views conflated with the
PO programme, and the latter with Esfeld and Deckert's proposal. It will be our
task to clear up this confusion.
