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Date: 2008-05-30 10:05:37Nature Systems theory Donald T. Campbell Natural selection Evolution Energy Thermal energy Crystallization Self-organization Chemistry Science Evolutionary biology | MARK H. BICKHARD and DONALD T. CAMPBELL VARIATIONS IN VARIATION AND SELECTION: THE UBIQUITY OF THE VARIATION-AND-SELECTIVE-RETENTION RATCHET IN EMERGENT ORGANIZATIONAL COMPLEXITYAdd to Reading ListSource URL: www.lehigh.eduDownload Document from Source WebsiteFile Size: 302,18 KBShare Document on Facebook |