[1] The fraternity is a 501(c)(3) not-for-profit organization incorporated in the state of Pennsylvania to foster scholarship, leadership, and fellowship.

Interested in creating an honor society at State Teachers College at Warrensburg (now the University of Central Missouri), professors Dr. Eldo L. Hendricks, Dr. Claude A. Phillips, and Dr. Clarence H. McClure contacted Phi Beta Kappa.

The existing officers continued to guide the fraternity and its ultimate reorganization until the next Grand Chapter meeting could be held.

By 1950, contact with alumni was critically affected by the war and the faculty advisors who guided the fraternity through two decades were ready to retire.

At the same time, The Lampadion ceased publication, leaving the Purple & Gold as the sole communication between the chapters and the national office.

Todd served as the Tau chapter advisor for many years and held virtually every officer position on the national council.

At East Carolina University, Todd was an outstanding history professor and advisor to many undergraduate organizations.

[5] At the October 1, 1966 Grand Chapter Convention in Washington D.C., president Abram Foster said, "We have remained stagnant and this is not good.

"[5] At the time, colleges and universities were openly discouraging social fraternities, while promoting honor organizations and scholarships.

The Centennial badge allowed for contrasting purple stones on the center stroke of the Phi.

Only a handful of new members are accepted each semester, meaning that the bid process is competitive and meeting the GPA requirement does not guarantee membership.

[9] In 2015, Hugh O'Brian Youth Leadership Foundation (HOBY) became Phi Sigma Pi's National Philanthropy.