Chapter 1. Lewis Fry Richardson - A Pioneer not Forgotten.- Chapter 2. Lewis Fry Richardson: A Personal Narrative.- Chapter 3. The Influence of the Richardson Arms Race Model.- Chapter 4. What Richardson Got Right (and Wrong) about Arms Races and War.- Chapter 5. Richardson and the Study of Dynamic Conflict Processes.- chapter 6. Back to the Future: Richardson's Multilateral Arms Race Model.- Chapter 7. From Hand-counting to GIS: Richardson in the Information Age.- Chapter 8. Weather, War, and Chaos: Richardson's Encounter with Molecules and Nations.- Chapter 9. When Lanchester met Richardson: The Interaction of Warfare with Psychology.- Chapter 10. On the Frequency and Severity of Interstate Wars.- Chapter 11. The Decline of War since 1950: New Evidence.- Appendix.