Although the morality of people and their ethics amount to the same thing, there is a usage that restricts morality to systems such as that of Kant, based on notions such as duty, obligation, and principles of conduct, reserving ethics for the more Aristotelian approach to practical reasoning, based on the notion of a virtue, and generally avoiding the separation of ‘moral’ considerations from other practical considerations. The scholarly issues are complex, with some writers seeing Kant as more Aristotelian, and Aristotle as more involved with a separate sphere of responsibility and duty, than the simple contrast suggests.