•Why it earns a slot
The Meno is the earliest text to present the doctrine of recollection and the immortality of the soul as a theory of knowledge, and its slave-boy geometry demonstration remains one of the most cited thought experiments in the history of philosophy and education.
Socrates and the young Thessalian Meno attempt to define virtue and determine whether it can be taught. Through a series of failed definitions and a famous demonstration with an uneducated slave boy, Socrates introduces the doctrine that all learning is recollection of knowledge the immortal soul already possesses. The dialogue ends without a settled definition of virtue, concluding provisionally that virtue is neither taught nor natural but a kind of divine gift or right opinion, distinct from genuine knowledge.
This distillation is written from the freely available original, which is always the better read when you have the time: gutenberg.org.