Philebus is a dialogue written by Plato in the late 4th century BC, exploring the nature of the good and the relationship between pleasure and wisdom. The conversation centers on Socrates and Protarchus, with Philebus representing the view that pleasure is the highest good. Socrates distinguishes between different types of pleasures, separating the good from the harmful, while examining whether wisdom or pleasure holds greater value. He further suggests the possibility of a higher good beyond both, prompting a deeper investigation. The dialogue emphasizes classification and analysis as it seeks to define the ultimate good in human life.