The use of probability and statistics has increased dramatically in all fields of research. This book presents an account of the resultant philosophical theories of probability and explains how they relate to one another.

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