Mencius was one of the great philosophers of ancient China, second only in influence to Confucius, whose teachings he defended and expanded. The Mencius, in which he recounts his dialogues with kings, dukes and military men, as well as other philosophers, is one of the Four Books that make up the essential Confucian corpus. It takes up Confucius's theories of jen, or goodness and yi, righteousness, explaining that the individual can achieve harmony with mankind and the universe by perfecting his innate moral nature and acting with benevolence and justice. Mencius' strikingly modern views on the duties of subjects and their rulers or the evils of war, created a Confucian orthodoxy that has remained intact since the third century BCE. For more than seventy years, Penguin has been the leading publisher of classic literature in the English-speaking world. With more than 1,700 titles, Penguin Classics represents a global bookshelf of the best works throughout history and across genres and disciplines. Readers trust the series to provide authoritative texts enhanced by introductions and notes by distinguished scholars and contemporary authors, as well as up-to-date translations by award-winning translators.