Contents: Preface, D.T. Campbell, Levels of Organization, Downward Causation, and the Selection-Theory Approach to Evolutionary Epistemology. A. Danailov, C. Togel, Evolutionary Epistemology: Science Philosophy. R.M. Lerner, A Developmental Contextual Critique of Evolutionary Epistemology. S. Wapner, J. Demick, Development of Experience and Action: Levels of Integration in Human Functioning. R.B. Cairns, Developmental Epistemology and Self-Knowledge: Toward a Reinterpretation of Self-Esteem. S. Chorover, Paradigms Lost and Regained: Changing Beliefs, Values and Practices in Neuropsychology. S. Scribner, A Sociocultural Approach to the Study of Mind. D.D. Jensen, A Phylogenetic Epistemology: The Evolution of Sensory Organs, Nervous Systems, and Effectors from Protozoan to Primate. R. Feleppa, Evolutionary Epistemology Naturalized: Comments on Lerner, Danailov, and Togel. E. Tobach, The Amoeba and Einstein.