The quantitative revolution plus 55 years: relevant, testable and reproducible modelling?

The quantitative revolution in geography in the 1960s and 1970s was an exciting time to be a post-graduate student. Like many social scientists, geographers at that time wanted to make the 'intellectual music' of science, the anthem of geography, from an orchestra of common methods and techniques. It is therefore with great appreciation that we thank Peter Haggett for providing retrospective comments on this volume as one of the conductors of the revolution. The term 'maestro' aptly applies to Peter and his many contributions, since the seminal work by Chorley and Haggett (1967) in Models in Geography was a catalyst and confirmation that models should be an integral part in the evolution of geographical knowledge.