This book outlines the realist and pluralist philosophy of John Anderson, Australia's most original thinker, whose articles and teaching at Sydney University have deeply influenced Australian intellectual life. Several main themes run though his work, but Anderson never gave an overall account of his views. This is remedied here: in exhibiting the range of Anderson's thought, from logic, epistemology and theory of mind, to language and social theory, Baker's work sketches realism as a systematic philosophical position and shows something of the history of ideas in Australia. This book will be of particular interest to historians of modern philosophy and those studying realism.