In the life sciences, there is wide-ranging debate about biodiversity. While nearly everyone is in favor of biodiversity and its conservation, methods for its assessment vary enormously. So what exactly is biodiversity? Most theoretical work on the subject assumes it has something to do with species richness with the number of species in a particular region but in reality, it is much more than that. Arguing that we cannot make rational decisions about what it is to be protected without knowing what biodiversity is, James Maclaurin and Kim Sterelny offer in "What Is Biodiversity?" a...

Rationis Defensor is to be a volume of previously unpublished essays celebrating the life and work of Colin Cheyne. Colin was until recently Head of the Department of Philosophy at the University of Otago, a department that can boast of many famous philosophers among its past and present faculty and which has twice been judged as the strongest research department across all disciplines in governmental research assessments. Colin is the immediate past President of the Australasian Association for Philosophy (New Zealand Division). He is the author of Knowledge, Cause, and Abstract Objects:...

Rationis Defensor is to be a volume of previously unpublished essays celebrating the life and work of Colin Cheyne. Colin was until recently Head of the Department of Philosophy at the University of Otago, a department that can boast of many famous philosophers among its past and present faculty and which has twice been judged as the strongest research department across all disciplines in governmental research assessments. Colin is the immediate past President of the Australasian Association for Philosophy (New Zealand Division). He is the author of Knowledge, Cause, and Abstract Objects:...