Since its fraternal origins a century ago, Phi Delta Kappa (PDK) International has been foremost a society of individuals joined together in professional collegiality and dedicated to tenets of leadership, service, and research in education. As PDK crosses the threshold into its second century, that early spirit of association lit in 1906, like the lamp of Truth on the organization's crest, still burns as brightly as ever. Today, across the United States and abroad, Kappans are striving to make PDK a beacon for networking, professional development, school improvement, and advocacy on behalf of high-quality, universally available education. In this article, the author casts a glance over their collective shoulder to see whence they have come as an organization and then to face forward, toward the future, and to consider where they are headed--and why. (Contains 8 endnotes.)