PBK is the oldest and most respected undergraduate honors organization in the United States. The Society has fostered and recognized excellence in the liberal arts and sciences since 1776. The Society's emblem, a key, is widely recognized as a symbol of academic achievement.

PBK elects over 15,000 new members a year from 270 chapters across the United States, has over 50 associations, and supports the ideals of the Society through academic, social, and community-based programs.

PBK fosters and promotes the liberal arts through its Scholarships and Awards program which includes fellowships, service awards and literary awards.

PBK has become involved with the National Honor Society and the Presidential Scholars Program by supporting national activities and exposing bright high school students to the benefits of the liberal arts and sciences at an early age.