A concise and illuminating book about theampampampnbspDutch philosopher Baruch Spinoza one of the early thinkers of the Enlightenment and modern biblical criticism.Spinozas theoretical philosophy is one of the most radical attempts to construct a pure ontology with a single infinite substance. This book which presents Spinozas main ideas in dictionary form has as its subject the opposition between ethics and morality and the link between ethical and ontological propositions. His ethics is an ethology rather than a moral science.Attention has been drawn to Spinoza by deep ecologists such as Arne Naess the Norwegian philosopher and this reading of Spinoza by Gilles Deleuze lends itself to a radical ecological ethic.