Short answers, pulled from the story.
Thales of Miletus founded Western philosophy in the 6th century BCE by declaring that water is the first principle of all things. He sought to describe the universe using natural causes rather than divine intervention.
The Platonic Academy closed in 529 CE by order of Emperor Justinian I, ending the classical period of ancient Greek thought. This event marked a shift where intellectual activity moved toward religious institutions after philosophical schools were suppressed.
Thomas Aquinas wrote the Summa Theologiae between 1224 and 1274 CE and proposed five arguments for God's existence. He claimed that essence and existence are distinct aspects of all entities except God.
John Locke published An Essay Concerning Human Understanding in 1689, rejecting innate knowledge and claiming all ideas derive from sensory experience. His work established empiricism as a primary method for acquiring knowledge.
Charles Sanders Peirce founded pragmatism, asserting meaning lies in practical consequences observable in action. William James expanded these ideas into psychology, describing consciousness as a continuous stream rather than isolated events.