Introduction to Metaphysics
An overview of the fundamental questions, main branches, and key concepts that define this central area of philosophy.
1. What Is Metaphysics?
| Aspect |
Description |
| Definition |
The branch of philosophy that investigates the nature of reality, existence, and what lies beyond the physical world. |
| Goal |
To answer “what is ultimately there?” and “what is it like?” |
| Method |
Conceptual analysis, logical argumentation, and thought experiments (often independent of empirical data). |
| Historical Roots |
Originates in ancient Greece (e.g., Aristotle’s Metaphysics), but appears in many philosophical traditions worldwide. |
2. Core Questions
- Ontology – What kinds of things exist?
- Examples: objects, properties, events, minds, numbers.
- Identity & Change – How can something remain the same while undergoing change?
- Key notions: persistence, perdurance, the Ship of Theseus.
- Causality & Agency – What does it mean for one thing to cause another?
- Issues: deterministic vs. indeterministic accounts, free will.
- Space & Time – What are the nature and structure of space and time?
- Debates: absolute vs. relational, presentism vs. eternalism.
- Modality – What does it mean for something to be possible, necessary, or contingent?
- Tools: possible‑world semantics, modal logic.
- Mind‑Body Problem – How are mental phenomena related to the physical world?
- Positions: dualism, physicalism, panpsychism, idealism.
3. Main Branches
| Branch |
Focus |
Representative Positions |
| Ontology |
Study of being and categories of existence. |
Substance theory, bundle theory, mereology. |
| Philosophy of Modality |
Nature of possibility and necessity. |
Modal realism (David Lewis), modal actualism. |
| Philosophy of Time |
Temporal ontology and the flow of time. |
Presentism, eternalism, growing‑block theory. |
| Metaphysics of Causation |
What constitutes causal relations. |
Counterfactual theories, regularity theories. |
| Philosophy of Mind |
Relation between mental states and physical world. |
Dualism, materialism, functionalism, panpsychism. |
| Metaphysics of Properties |
Nature of qualities, universals vs. particulars. |
Realism about universals, nominalism, trope theory. |
4. Key Concepts & Terminology
| Term |
Meaning |
| Substance |
An entity that exists independently and bears properties (e.g., a particular tree). |
| Property |
A feature or quality that can be instantiated by substances (e.g., redness). |
| Universal |
A repeatable property that can be shared by many particulars (e.g., the property of “being red”). |
| Particular |
An individual, concrete entity (e.g., this specific apple). |
| Trope |
A particularized property; a concrete instance of a universal (e.g., this shade of red). |
| Possible World |
A complete way reality could have been; used to analyze modality. |
| Essential vs. Accidental |
Essential properties define what a thing is; accidental properties can change without altering its identity. |
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