 Philosophy admits of the following divisions, corresponding to the different modes of mental or spiritual activity. Mental activity is either theoretic (it understands or contemplates) or it is practical (it wills actions). These in turn divide: The theoretic divides into the aesthetic, which deals in particulars (individuals or intuitions), and logic or the intellectual domain, which deals in concepts and relations, or universals. The practical divides into the economic—by which Croce means all manner of utilitarian calculation—and the ethical or moral. Each of the four domains are subject to a characteristic norm or value: aesthetic is subject to beauty, logic is subject to truth, economic is subject to the useful (or vitality), and the moral is subject to the good. Croce devoted three lengthy books written between 1901 and 1909 to this overall scheme of the ‘Philosophy of Spirit’: Aesthetic (1901) and (1907) (revised), Logic (1909) and the Philosophy of the Practical (1908), the latter containing both the economic and ethics (in today’s use of term you might call the overall scheme Croce’s metaphysics, but Croce himself distanced himself from that appellation; there is also some sense in calling it philosophy of mind).