Brett Calcott is a Postdoctoral Researcher at the ASU/SFI Center for Complex Biosocial Systems in the School of Life Sciences at Arizona State University and coeditor (with Kim Sterelny) of The Major Transitions in Evolution Revisited (MIT Press, 2011).

Kim Sterelny is Professor of Philosophy at the Australian National University. He is the coauthor of Language and Reality: An Introduction to the Philosophy of Language and the author of The Evolved Apprentice: How Evolution Made Humans Unique (both published by the MIT Press) and other books.