Final answer:
The first Greek letter society was the Phi Beta Kappa, founded in 1776 at the College of William & Mary. It promoted the ideals of liberal arts education and intellectual curiosity.
Step-by-step explanation:
The first Greek letter society was the Phi Beta Kappa, which was founded on December 5, 1776, at the College of William & Mary in Williamsburg, Virginia. It was established as a secret society for students who excelled in their studies and demonstrated high moral character. Phi Beta Kappa is known for promoting the ideals of liberal arts education and intellectual curiosity.