[1] Plato, _The Republic_, trans. Francis MacDonald Cornford (New York:
Oxford University Press, 1945).
[2] Wilfrid Desan, _Planetary Man_ (New York: The Macmillan Company,
1972).
[3] John Hersey, _A Single Pebble_ (New York: Alfred A. Knopf, 1956), p.
18.
[4] Hermann Hesse, _Steppenwolf_ (New York: Holt, Rinehart and Winston,
1966), p. 60.
[5] Gabriel Marcel, _Homo Viator_ (New York: Harper & Row, Publishers,
Harper Torchbooks, 1962), p. 121.
[6] Teilhard de Chardin, _The Phenomenon of Man_ (New York: Harper &
Row, Publishers, 1961).
[7] Norman Kiell, _The Universal Experience of Adolescence_ (New York:
International Universities Press, 1964), pp. 22-44.
[8] Martin Buber, _I and Thou_, 2nd ed., trans. Ronald Gregor Smith (New
York: Charles Schribner's Sons, 1958).
[9] Hesse, _Steppenwolf_, p. 60.
[10] Plato, _The Republic_.
[11] Robert A. Heinlein, _Time Enough for Love_ (New York: G. P.
Putnam's Sons. 1973).
[12] Frederich Nietzsche, "Beyond Good and Evil," trans. Helen Zimmern,
in _The Philosophy of Nietzsche_ (New York: Random House, 1927) and
"Thus Spoke Zarathustra." trans. Thomas Common, in the _Philosophy of
Nietzsche_ (New York: Random House, 1927).
[13] Martin Buber, _Between Man and Man_, trans. Ronald Gregor Smith
(Boston: Beacon Press, 1955).
[14] Norman Cousins, _Who Speaks for Man?_ (New York: The Macmillan
Company, 1953).
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