Unjustly ignored as a result of a 13th century condemnation, the thought of Johannes Scottus Eriugena (ca. 810-877) has only been subject to critical study in the 20th century. Now, with the completion of the critical edition of Eriugena's masterwork -- the Periphyseon -- the time has come to explore what is arguably the most intriguing and vital theme in his work: creation and nature. In honor of Edouard Jeauneau -- Institute Professor at the Pontifical Institute of Mediaeval Studies, University of Toronto and Honorary Research Director at the C.N.R.S. in Paris, to whom the field of Eriugenian studies is enormously indebted -- this volume seeks to undertake a serious examination of the centrality of Eriugena's thought within the Carolingian context, taking into account his Irish heritage, his absorption of Greek thought and his place in Carolingian culture; of Eriugena as a medieval thinker, both his intellectual influences and his impact on later medieval thinkers; and of Eriugena's reception by modern philosophy, from considerations of philosophical idealism to technology.