Eric Weiner
Montaigne, Michel de
Ayn Rand
Abraham Joshua Heschel
Thomas More
Monroe C. Beardsley
Douglas R. Hofstadter
Hannah Arendt
Isaiah Berlin
Yogananda Paramahansa
Friedrich Nietzsche
Donald F. Gustafson
Plutarch
Herbert Marcuse
John Locke
John Ruskin
Henry David Thoreau
Bertrand Russell
Auguste Valensin
Jürgen Habermas