Robert K. Greenleaf published two posthumous essay collections (available at Greenleaf.org). Today scores of colleges and universities include Servant Leadership in their curricula and hundreds of companies embrace Greenleaf's philosophy. As Greenleaf strived to serve through education, he became the leader of a movement. Bass, B. M., and Stogdill, R. M. (1990). "Bass & Stogdill's Handbook of Leadership: Theory, Research, and Managerial Applications" (3rd ed.). New York:Free Press. Frick, Don M. (2004)." Robert K. Greenleaf: A Life of Servant Leadership." San Francisco: Berrett-Koehler Publishers. Greenleaf, R.K. (2003). "The Servant-Leader Within: a Transformative Path" New York: Paulist Press. Greenleaf, R. K. (2002). "Servant Leadership:
Liberty Leading the People Antheil titled his Symphony No. 6 "After Delacroix", and stated that the work was inspired by "Liberty Leading the People". The imagery was adapted by Robert Ballagh to commemorate Ireland's independence struggle on an Irish postage stamp in 1979, the centenary of the birth of Pádraig Pearse, and the painting was used for the band Coldplay's album cover "Viva la Vida or Death and All His Friends", with the words "Viva La Vida" written in white. The cover of the book "Enough is Enough: How to Build a New Republic" by Fintan O'Toole references the painting, but with Kathleen Ni