Task: Text Categorization
Input (English): G.E. Moore wrote a book on the principles of this subject, in which he described the naturalistic fallacy. Spinoza's book on this philosophical subject is divided according to a ""geometric"" scheme. Aristotle's book on this describes the highest aim in life as happiness, and is named after his son Nicomachus. For 10 points, name this subject within philosophy which is concerned with questions of morality.
Output (English): Social Science