The Twentieth Century has seen a dramatic rise in the use of probability and statistics in almost all fields of research. This has stimulated many new philosophical ideas on probability.
Philosophical Theories of Probability is the first book to present a clear, comprehensive and systematic account of these various theories and to explain how they relate to one another. Gillies also offers a distinctive version of the propensity theory of probability, and the intersubjective interpretation, which develops the subjective theory.

1. Introductory Survey of the Interpretations. Some Historical Background. 2. The Classical Theory 3. The Logical Theory 4. The Subjective Theory 5. The Frequency Theory 6. The Propensity Theory: (i) General Survey 7. The Propensity Theory: (ii) Development of a Particular Version 8. Intersubjective Probability and Pluralist Views of Probability 9. An Example of Pluralism. Differences between the Natural and Social Sciences