The Politics, by the ancient Greek philosopher Aristotle, is one of the most influential texts in political philosophy. In it, Aristotle explores the role that the political community should play in developing the virtue of its citizens. One of his central ideas is that “Man is a political animal,” meaning that people can only become virtuous by active participation in the political community. Aristotle also criticizes his teacher Plato, classifies and evaluates six different types of constitutions and political institutions, and describes his vision of the ideal state. Aristotle’s views on women and slavery are unenlightened by today’s standards, but his work remains enduring...

Physics (Greek: Φυσικὴ ἀκρόασις; Latin: Physica, or Physicae Auscultationes) discusses concepts including: substance, accident, the infinite, causation, motion, time and the Prime Mover.

On the Soul (Greek Περὶ Ψυχῆς (Perì Psūchês), Latin De Anima) is a major treatise by Aristotle on the nature of living things. His discussion centres on the kinds of souls possessed by different kinds of living things, distinguished by their different operations. Thus plants have the capacity for nourishment and reproduction, the minimum that must be possessed by any kind of living organism. Lower animals have, in addition, the powers of sense-perception and self-motion (action). Humans have all these as well as intellect. The notion of soul used by Aristotle is only distantly related to the usual modern conception. He holds that the soul is the form, or essence of any living thing; that ...

Metaphysics is essentially a reconciliation of Plato’s theory of Forms that Aristotle acquired at the Academy in Athens, with the view of the world given by common sense and the observations of the natural sciences. According to Plato, the real nature of things is eternal and unchangeable. However, the world we observe around us is constantly and perpetually changing. Aristotle’s genius was to reconcile these two apparently contradictory views of the world. The result is a synthesis of the naturalism of empirical science, and the mysticism of Plato, that informed the Western intellectual tradition for more than two thousand years. At the heart of the book lie three questions. What is e...

On Generation and Corruption (Ancient Greek: Περὶ γενέσεως καὶ φθορᾶς, Latin: De Generatione et Corruptione, also known as On Coming to Be and Passing Away) is a treatise by Aristotle. Like many of his texts, it is both scientific and philosophic (although not necessarily scientific in the modern sense). The philosophy, though, is essentially empirical; as in all Aristotle's works, the deductions made about the unexperienced and unobservable are based on observations and real experiences. The question raised at the beginning of the text builds on an idea from Aristotle's earlier work The Physics. Namely, whether things come into being through causes, through some prime material, or whethe...

On the Heavens (Greek: Περί ουρανού, Latin: De Caelo or De Caelo et Mundo) is Aristotle's chief cosmological treatise. In it Aristotle argues that the Earth is a sphere by pointing to the evidence of lunar eclipses. Aristotle also provides a detailed explanation of his theory of 'gravity' arguing that things which contain 'earth' fall towards the centre of the Universe because 'earth' is naturally attracted to the centre of the Universe. Aristotle argues that if the planet Earth was moved to the location of the Moon then objects which contain 'earth' would not fall towards the centre of the Earth but rather towards the centre of the Universe. Aristotle believed that the more 'earth' an ob...

Parva Naturalia [the "short treatises on nature" (a conventional Latin title first used by Giles of Rome)] is a collection of books by Aristotle, which discuss natural phenomena involving the body and the soul. The books are as follows:
I - On Sensation and the Sensible
II - On Memory and Recollection
III - On Sleeping and Waking
IV - On Dreams
V - On Prophecy in Sleep
VI - On Longevity and Shortness of Life
VII - On Youth and Old Age, Life and Death
VIII - On Respiration

Eudemian Ethics (Greek: ΗΘΙΚΩΝ ΕΥΔΗΜΙΩΝ Latin: ETHICA EUDEMIA) discusses topics including virtue, friendship, happiness and God. It is believed to have been written before Nicomachean Ethics and to be named after Eudemus of Rhodes. Books IV, V, and VI of Eudemian Ethics are identical to books V, VI, and VII of Nicomachean Ethics and are excluded from this translation.

Magna Moralia (Ancient Greek: ΗΟΙΚΩΝ ΜΕΓΑΛΩΝ, English: Great Ethics) discusses topics including friendship, virtue, happiness and God. It is disputed whether Aristotle wrote Magna Moralia. This author concludes that it is absurd to suggest that God contemplates only God but does not propose an alternative activity for God.

Economics (Greek: ΟΙΚΟΝΟΜΙΚΑ; Latin: Oeconomica) may not have been written by Aristotle. The author provides examples of methods used by the state to raise money including debt, currency devaluation, commodity controls, tariffs, sales tax, fines, violence and sacrilege.