HarperCollins is proud to present its incredible range of best-loved, essential classics. Despite dating from the 4th century BC, The Art of Rhetoric continues to be regarded by many as the single most important work on the art of persuasion. As democracy began emerging in 5th-century Athens, public speaking and debate became an increasingly important tool to garner influence in the assemblies, councils, and law courts of ancient Greece. In response...

"All men by nature are actuated with the desire of knowledge," declared Aristotle. The philosopher's works are foundational to the history of science, and his treatise on metaphysics, or "first philosophy," is divided into sections on previous philosophical thought and theories; a refutation of skepticism; a demonstration of God's existence; an examination of the relation of metaphysics to the other sciences; an elucidation of the nature of the infinite;...

The Categories is a text from Aristotle's Organon that enumerates all the possible kinds of things that can be the subject or the predicate of a proposition. They are "perhaps the single most heavily discussed of all Aristotelian notions". The work is brief enough to be divided, not into books as is usual with Aristotle's works, but into fifteen chapters. The Categories places every object of human apprehension under one of ten categories (known to...

Written in 350 BC, Aristotle's "De Anima" or "On the Soul" is not a work on spirituality, as the title would suggest, but rather a work that could be described as one of biopsychology, or a work on the subject of psychology from a biological perspective. Aristotle's exposition centers on the soul. Aristotle's soul however is not the same as the common modern spiritual conception of something distinct from the body that lives on past death. Rather...

We have, in the next place, to treat of Memory and Remembering, considering its nature, its cause, and the part of the soul to which this experience, as well as that of Recollecting, belongs. For the persons who possess a retentive memory are not identical with those who excel in power of recollection; indeed, as a rule, slow people have a good memory, whereas those who are quick-witted and clever are better at recollecting.

We must now treat of youth and old age and life and death. We must probably also at the same time state the causes of respiration as well, since in some cases living and the reverse depend on this.

Written sometime in the 4th Century BC, Aristotle's "Rhetoric" is the definitive treatise on the art of persuasive public speaking. The art of oratorical persuasion was an essential skill for the successful politician during the days of ancient Greece and Aristotle's "Rhetoric" is considered one of the greatest works from antiquity on the subject. Like many of the surviving works attributable to Aristotle, "Rhetoric" was not intended for public dissemination,...

Generally seen as a pioneering work of zoology, Aristotle frames his text by explaining that he is investigating the existing facts about animals. History of Animals is one of the major texts on biology.

We have already discussed the first causes of nature, and all natural motion, also the stars ordered in the motion of the heavens, and the physical element-enumerating and specifying them and showing how they change into one another-and becoming and perishing in general. There remains for consideration a part of this inquiry which all our predecessors called meteorology. It is concerned with events that are natural, though their order is less perfect...

Ancient accounts of Aristotle credit him with 170 Constitutions of various states; it is widely assumed that these were research for the Politics, and that many of them were written or drafted by his students. Athens, however, was a particularly important state, and where Aristotle was living at the time; it is plausible that, even if students did the others, Aristotle did that one himself, and possible that it was, intended as, a model for the rest....