  According to (neo-)Aristotelian virtue ethics, the primary moral concept is that of virtue. Virtue is a property of people; virtuous people are good people. So what does it take for someone to be a good person? Aristotle’s influential answer to that question is that what it takes to be a good thing is for that thing to successfully perform its function. And, Aristotle argued, all living things have a proper function, which is determined by their nature. Just as hammers and nails have different functions which spring from the nature of those things, living things have functions that are also determined by their natures. Worker bees are supposed to collect honey—worker bees that do this well are good bees. Venus flytraps are supposed to capture flies—those that do this well are good flytraps. And humans are good if they pursue their function, as dictated by their nature.