Aldo Leopold book A Sand County Almanac
Source: A Sand County Almanac, 1949, "The Land Ethic", p. 203-204.
Source: A Sand County Almanac, 1949, "The Land Ethic", p. 225.
Aldo Leopold book A Sand County Almanac
Source: A Sand County Almanac, 1949, "The Land Ethic", p. 203-204.
J. Howard Moore (1862–1916)
Source: Why I Am a Vegetarian: An Address Delivered before the Chicago Vegetarian Society (1895), pp. 19–20
Aldo Leopold book A Sand County Almanac
Source: A Sand County Almanac, 1949, "The Land Ethic", p. 209.
J. Howard Moore (1862–1916)
"Modern Ethics", pp. 268–269
The Universal Kinship (1906), The Ethical Kinship
Thomas Jefferson (1743–1826) 3rd President of the United States of America
Letter to Robert Skipwith (3 August 1771) http://oll.libertyfund.org/Texts/Jefferson0136/Works/0054-02_Bk.html#hd_lf054.2.head.010 ; also in The Writings of Thomas Jefferson (19 Vols., 1905) edited by Andrew A. Lipscomb and Albert Ellery Bergh, Vol. 4, p. 239 http://books.google.com/books?vid=OCLC61981280&id=YjaXnbNMaccC&pg=RA6-PA239&lpg=RA6-PA239&dq=Bergh+%22volumes+of+ethics,+and+divinity%22 <br class="br">1770s
“Ethical individualism… is spiritualized theory of evolution carried over into moral life.”
Rudolf Steiner book Philosophy of Freedom
Philosophy of Freedom, Chapter 12
Aldo Leopold book A Sand County Almanac
Source: A Sand County Almanac, 1949, "The Land Ethic", p. 202.
George Gaylord Simpson (1902–1984) American paleontologist
Cited in: Edward J. Larson (2004) Evolution, Modern Library. p. 250