The notion of fundamentality, as it is used in metaphysics, aims to capture the idea that there is something basic or primitive in the world. This metaphysical notion is related to the vernacular use of “fundamental”, but philosophers have also put forward various technical definitions of the notion. Among the most influential of these is the definition of absolute fundamentality in terms of ontological independence or ungroundedness. Accordingly, the notion of fundamentality is often associated with these two other technical notions.

Within physics there are two ways of establishing the relative fundamentality of one theory compared to another, via two senses of reduction: "inter-level" and "intra-level" (Crowther, 2018). The former is standardly recognised as roughly correlating with the chain of ontological dependence (i.e., the phenomena described by theories of macro-physics are typically supposed to be ontologically dependent on the entities/behaviour described by theories of micro-physics), and thus has been of interest to naturalised metaphysics. The latter, though, has not been considered interesting (...) for metaphysics, because it is not thought to correlate either with ontological dependence, nor causal or dynamical dependence. I argue, however, that this is a mistake, and that actually, the intra-level relation does reflect ontological dependence (in the same sense as the inter-level relation) and thus should not be neglected by metaphysics of physics. This argument further supports the assertion that the same notion of fundamentality underlies both the inter- and intra-level claims of fundamentality in physics, and that this notion of relative fundamentality in physics correlates with that of metaphysics. (shrink)

Priority monism is the view that the cosmos is the basic concrete entity on which each of its parts depend. Kovacs has recently argued that none of the classical notions of dependence could be used to spell out priority monism. I argue that four notions of dependence – namely rigid existential dependence, generic existential dependence, explanatory dependence, and generalised explanatory dependence – can indeed be used to spell out priority monism, and specify the conditions under which this is possible.

There are many historical concerns about freedom that have come to be deemphasized in the free will literature itself—for instance, worries around the tyranny of government or the alienation of capitalism. It is hard to see how the current free will literature respects these, or indeed how they could even find expression. This paper seeks to show how these and other concerns can be reintegrated into the debate by appealing to a levels ontology. Recently, Christian List and others have considered (...) how the notion of levels could be relevant to the free will debate. Invariably, however, the focus is on the significance of facts at lower levels. The threats come from below, from fundamental physics or neuroscience. Here, I aim to show how we can frame many interesting concerns about free will in terms of threats from above. After arguing that determination from above is no less threatening, I catalogue such concerns that might constitute threats to our freedom. Doing this not only allows us to show how these concerns relate to those standardly discussed, but it pushes us to expand our conception of freedom. (shrink)

Priority monism is the doctrine that there is only one basic object: the entire cosmos. Priority monists often take this to be a metaphysically necessary thesis. I explore the consequences of modalizing the priority monist thesis. I argue that, modulo some assumptions, the modalized thesis entails the necessary existence of the actual cosmos. I further argue that, if the modalized thesis is true, and the actual cosmos necessarily exists, then the only possible concrete objects are the actually existing ones.

Schaffer offers us in the last section of “On What Grounds What” (2009) an applied illustration of his allegedly Aristotelian metaontological position. According to this illustration, Schaffer’s metaontological position, supplemented with a few Aristotelian theses about substance and grounding, would converge in a view remarkably similar to his priority monism (Philosophical Studies, 145, 131–148, 2009b; Philosophical Review, 119, 31–76, 2010a), the view that there is one single fundamental substance. In this paper, I will argue against Schaffer’s suggestion that priority monism (...) represents a viable development of Aristotelian metaphysics. In particular, I will hold that the most plausible version of Schaffer’s priority monism by Aristotelian standards fails to satisfy basic Aristotelian tenets about dependence, composition, change, and persistence, and suggest that this is evidence that Aristotelians are more at home with a pluralism rather than a monism about substance. (shrink)

The Idea of a unified foundation of all reality has long been core to many attempts at a fundamental ontology, as well as many arguments for the divine. In medieval India a cluster of arguments for metaphysical inheritance, causal entanglement, the impossibility of fundamental relations and more, were advanced together to show there must be an ultimate and unified ground. But foundationalism has been under attack in both recent metaphysics, and Buddhist philosophy. This article unpacks Vedānta’s defense of divine foundationalism (...) against Madhyamaka Buddhism’s metaphysical nihilism. Firstly, we look at how inheritance arguments for ultimate ground aimed to circumvent the possibility of infinite regress. Secondly, we assess three arguments that this ground is a unified modal anchor, with entangled causal power, providing a connective medium for all phenomena. We address some caveats and limitations, but go on to argue that if they are right, they circumvent the Buddhists’ ‘dualistic’ assumption that if the empirical world is mere imagined convention, it needs no explanation. Monists and nihilists are allies against excessively realist ontologies, but these arguments make a compelling case for some unified fundamental nature from which, as the Upaniṣads put it, all things emerge like sparks from a fire. (shrink)

This entry focuses on two of the more historically important monisms: existence monism and priority monism . Existence monism targets concrete objects and counts by tokens. This is the doctrine that exactly one concrete object exists. Priority monism also targets concrete objects, but counts by basic tokens. This is the doctrine that exactly one concrete object is basic, which will turn out to be the classical doctrine that the whole is prior to its parts.

According to High-Dimensional Wavefunction Fundamentalism (HDWF) the wavefunction field evolving in configuration space is all that exists fundamentally. The main argument in favor of HDWF is an argument from separability and locality: separability is a desirable feature of a fundamental metaphysics and HDWF is indeed such a separable metaphysics. Separability in turn is desirable because it is simple and intuitive. Tim Maudlin has recently argued that intuitiveness and simplicity cannot motivate separability. In particular, our intuitions stem from our interactions with (...) the three-dimensional world which is non-separable. Therefore, he concludes, there is _nothing else_ HDWF theorists can appeal to motivate separability. I call this Maudlin’s challenge. The present paper addresses Maudlin’s challenge by showing how the facts that some plurality of entities are separable entail that its constituents are fundamental, for well-motivated notions of fundamentality. (shrink)