Aristotle: Life and Main Philosophical Ideas

Biographical Background

Aristotle lived from 384 to 322 BCE. He was born in Stagira, studied for about twenty years in Plato's Academy, later taught Alexander the Great, and eventually founded his own school, the Lyceum, in Athens. His father had been associated with the Macedonian court as a physician, and Aristotle's own work shows deep interest in biology and empirical observation.

Aristotle wrote on logic, metaphysics, physics, biology, psychology, ethics, politics, rhetoric, and poetics. His surviving works are often lecture notes or school texts rather than polished dialogues. In the medieval period he became a central authority in Islamic, Jewish, and Christian philosophy.

Philosophical Thought

Aristotle both inherited and criticized Plato. Against Plato's separation of Forms from sensible things, Aristotle argued that form exists in things, not in a separate world. Concrete substances are composites of matter and form. Matter is what something is made of; form is what makes it the kind of thing it is.

His theory of four causes explains things through material cause, formal cause, efficient cause, and final cause. To understand a statue, for example, one must know its marble, its shape, the sculptor who made it, and the purpose for which it was made. Aristotle's explanations are therefore multi-dimensional.

In metaphysics, Aristotle studies being as being. Substance is primary, because properties depend on substances. To explain change, he introduces potentiality and actuality. An acorn is potentially an oak; growth is the actualization of that potential. This allows Aristotle to answer Parmenides without denying change.

Aristotle also founded formal logic, especially the theory of syllogism. His logical works shaped Western reasoning for centuries.

In ethics, Aristotle argues that the highest human good is eudaimonia, often translated as happiness or flourishing. It is not a passing feeling but an activity of the soul in accordance with virtue. Virtues are stable habits developed through practice. Courage, for example, is the mean between cowardice and rashness.

In politics, Aristotle calls the human being a political animal. The city exists not merely for survival but for the good life. Political institutions should cultivate virtue and enable citizens to live well.

Aristotle's importance lies in his systematic realism. He sought form within concrete things, treated experience seriously, and gave philosophy a set of conceptual tools that shaped logic, science, ethics, and metaphysics for two millennia.