Applying the analogy of the four supporting pillars of support for a table — and thus, in similar fashion with a true and lasting, moral leader — Hagelberg discusses how four leadership principles in particular – integrity, competence, emotional intelligence, and vision – are the four essential traits of successful and lasting leadership.
Hagelberg, Travis M.
"Leadership: The Tabletop Concept,"
The Journal of Values-Based Leadership: Vol. 4
, Article 7.
Available at: http://scholar.valpo.edu/jvbl/vol4/iss1/7