Aristotle is the Greek philosopher known for his significant contributions to logic and western philosophy. Living from 384 to 322 BCE, he was a student of Plato and later became a teacher himself. Aristotle's writings cover a vast array of subjects, including ethics, metaphysics, politics, and natural sciences. Among his key contributions is the development of syllogistic logic, which laid the groundwork for deductive reasoning. His influence permeated various fields of study and has shaped philosophical thought for centuries. Aristotle's works still resonate today, and he is often regarded as one of the greatest thinkers in Western history.