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7. Existence / D. Theories of Reality / 5. Naturalism

[there is nothing beyond what we call 'nature']

6 ideas
Non-human things are explicable naturally, and voluntary things by the will, so God is not needed [Aquinas]
     Full Idea: All natural things can be reduced to one principle, which is nature; and all voluntary things can be reduced to one principle, which is human reason, or will. Therefore God does not exist.
     From: Thomas Aquinas (Summa Theologicae [1265], Ia,Q02,Art3,Ob2)
     A reaction: Not, of course, the opinion of Aquinas. So the possibility of naturalism (assuming the human will can be further reduced to nature) was a clear option in the thirteenth century. In reply Aquinas cites his Fifth Way.
Laws of nature are universal, so everything must be understood through those laws [Spinoza]
     Full Idea: Nature's laws ....are everywhere and always the same; so that there should be one and the same method of understanding the nature of all things whatsoever, namely through nature's universal laws and rules.
     From: Baruch de Spinoza (The Ethics [1675], III Pref)
     A reaction: Leiter calls this Methodological Naturalism, which says that the procedures and findings of philosophy should conform to those of science. I think I'm also a Substantive Naturalist, who says 'that's all there is'.
I only want thinking that is anchored in body, senses and earth [Nietzsche]
     Full Idea: I am not interested …in ways of thinking that are not anchored in the body and the senses and in the earth.
     From: Friedrich Nietzsche (Unpublished Notebooks 1884-85 [1884], 26[352])
     A reaction: Exhibit A for Nietzsche as Naturalist. Indeed, this could be a manifesto for the whole school. I totally and completely and utterly agree with Nietzsche's assertion!. I see the 'anchor' as two-way: thought connects to earth, and thought arises from it.
First see nature as non-human, then fit ourselves into this view of nature [Nietzsche]
     Full Idea: My task is the dehumanisation of nature, and then the naturalisation of humanity once it has attained the pure concept of 'nature'.
     From: Friedrich Nietzsche (Works (refs to 8 vol Colli and Montinari) [1885], 9.525), quoted by Rüdiger Safranski - Nietzsche: a philosophical biography 10
     A reaction: Safranski sees this as summarising Nietzsche's project, and it could be a mission statement for naturalism. This idea pinpoints why I take Nietzsche to be important - as a pioneer of the naturalistic view of people.
'Naturalism' says only the world of space-time exists [Armstrong]
     Full Idea: I define 'naturalism' as the hypothesis that the world of space-time is all that there is.
     From: David M. Armstrong (Truth and Truthmakers [2004], 09.1)
     A reaction: This is helpful, because it doesn't mention the nature of the physical matter contained in space-time, leaving theories like panpsychism as possible naturalistic theories. Galen Strawson, for example.
Externalism may be the key idea in philosophical naturalism [Papineau]
     Full Idea: Some people view an externalist approach to epistemology as the essence of philosophical naturalism.
     From: David Papineau (Philosophical Naturalism [1993], Intro)
     A reaction: I suspect philosophers avoid psychology and mental events, simply because they are elusive. Externalism is a theory about justification, and independent of naturalism as a metaphysic.