- The Cambridge Companion to the 'Origin of Species' (Cambridge Companions to Philosophy)
- The Tragic Sense of Life: Ernst Haeckel and the Struggle over Evolutionary Thought
- The Romantic Conception of Life: Science and Philosophy in the Age of Goethe (Science and Its Conceptual Foundations series)
- Was Hitler a Darwinian?: Disputed Questions in the History of Evolutionary Theory
- Darwin and the Emergence of Evolutionary Theories of Mind and Behavior (Science and Its Conceptual Foundations series)







