1. Metaphysics
   1. cosmology
   2. ontology
2. Epistemology
3. Ethics
   1. meta-ethics
   2. descriptive
   3. normative ethics
   4. applied ethics
4. Political Philosophy
5. Aesthetics
6. Logic
   1. mathematical logic
   2. philosophical logic
7. Philosophy of Mind
   1. dualism
   2. materialism
   3. Cognitive Science
   4. monism
8. Philosophy of Language