1. In Defence of Scientism . . 1 2. Scientific Realism, Constructive Empiricism, and Structuralism . . 66 3. Ontic Structural Realism and the Philosophy of Physics . . 130 4. Rainforest Realism and the Unity of Science . . 190 5. Causation in a Structural World . . 258 6. Conclusion—Philosophy Enough . . 298 References . . 311 Index . . 339