This paper advances crime prevention through environmental design (CPTED) theory and practice by introducing a holistic and integrated crime prevention theory called Third-Generation CPTED. We use Third-Generation CPTED to expand both the situational focus of traditional CPTED and the social ecology/neighbourhood focus of Second-Generation CPTED, by creating a new theory that integrates human motivation and aspirations within a neighbourhood Liveability Hierarchy. Central to our theory is the planning concept of liveability and, because safety from crime, fear, and victimization is such an integral part of quality of life, we present two underlying themes on which liveability depends: public health and sustainability. We propose some theoretical assumptions and propositions that underpin the theory and suggest areas for future research. Our contention is that a holistic and integrative Third-Generation CPTED elevates liveability from the role of basic infrastructure and habitat to providing residents with opportunities to enhance their own personal aspirations and improve their quality of life.

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Crime reduction strategies are often faced with the criticism of crime displacement. Conversely, criminologists find that reductions in crime in one area have a ‘diffusion of benefits’ to surrounding areas. However, these findings are limited due to a lack of extensive longitudinal data and qualitative data that provide context. We examine a natural experiment in displacement: the removal of a convergence setting in which calls for service immediately declined. However, other areas emerged as problematic and, in some places, crime increased dramatically. Using a qualitatively informed trajectory analysis, we examine whether the removal of a convergence setting results in displacement across the entire city. We discuss the implications for opportunity theories and prevention strategies.

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