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The author is well qualified to write about the subject. As stated in the preface, "this short book is an essay on theoretical biology." Mr. Lillie discusses his subject in a clear, logical, understandable manner. He demonstrates how the simple fact of evolutionary change proves that nature is not wholly stable. Evolution clearly indicates that the existence of various forms, systems and activities were at some time new. A general idea of the clarity with which he expresses himself may be obtained from a brief quotation from the summary at the end of the book: "In life processes, as experienced in ourselves, we find a foundation of stable conditions and processes which are physical; superimposed on these we find also the immediately felt quality or property which we call psychical. The latter is a matter of direct experience and is active in the present; and since present time is new
General Biology and Philosophy of Organism. JAMA. 1946;130(12):824. doi:10.1001/jama.1946.02870120070034