In his written dialogues, Plato developed accounts of knowledge, reality, humanity, society, goodness, God, and beauty. Usually, when people speak of Platonism, they are referring to his theory of Forms, accompanied by a doctrine of the immortality of the soul and values that transcend power, prestige, and pleasure. Western thought has developed either by following and adapting his accounts or by reacting to them, either directly or indirectly through, most notably, Aristotle, Plotinus, Philo, and Augustine. The theory of Forms established the most basic concept of science as it came to be practiced in Europe, namely, that science aims to discover objective principles, in other words, "Forms." Plato's doctrine of the immortality of the soul and values that transcend the material world have reinforced and shaped systematic thinking within Judaism, Christianity, and Islam.