Ideas of George Santayana, by Theme

[American, 1863 - 1952, Born in Madrid. Taught by William James. Professor at Harvard University. Moved to Rome in 1912.]

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1. Philosophy / C. History of Philosophy / 1. History of Philosophy
He who is ignorant of the history of philosophy is doomed to repeat it
     Full Idea: Santayana remarked that he who is ignorant of the history of philosophy is doomed to repeat it.
     From: report of George Santayana (The Life of Reason [1906]) by Alasdair MacIntyre - A Short History of Ethics Ch.1
     A reaction: Santayana's remark seems to have been about history in general, so this is a Macintyre thought. It obviously has a lot of truth, and most great philosophers seem hugely knowledgeable. However, ignorance brings a kind of freedom.
7. Existence / A. Nature of Existence / 6. Criterion for Existence
The criterion of existence is the possibility of action
     Full Idea: The possibility of action ...is the criterion of existence, and the test of substantiality.
     From: George Santayana (The Realm of Matter [1930], p.107), quoted by John Heil - The Universe as We Find It
     A reaction: I rather like this. I think I would say the power is the criterion of existence.
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / e. Human nature
The good is not relative, but is rooted in facts about human needs
     Full Idea: The good is by no means relative to opinion, but is rooted in the unconscious and fatal nature of living beings, a nature which predetermines for them the difference between foods and poisons, happiness and misery.
     From: George Santayana (Platonism and the Spiritual Life [1927], p.3), quoted by John Gray - Seven Types of Atheism 6
     A reaction: That is, he concedes that the good is relative to human beings, but that the relevant facts about human beings are not relative. I think he has the correct picture. The key point is that the good is 'rooted' in something, and doesn't just float free.