Step 1: Understanding the Concept:
"The Poetics" is the foundational text of Western dramatic theory and literary criticism.
Step 2: Detailed Explanation:
Aristotle wrote The Poetics (c. 335 BCE), the first philosophical work to focus on literary theory.
In this work, he defines tragedy and its function, famously introducing the concept of Catharsis.
Catharsis refers to the "purgation" or "cleansing" of the audience's emotions of pity and fear through the experience of watching a dramatic tragedy.
His teacher, Plato, had criticized art for stirring up irrational emotions, but Aristotle argued that this emotional release was actually healthy and beneficial for the soul.
Step 3: Final Answer:
Aristotle is the philosopher who wrote "The Poetics."