This text was presented as inaugural speech, held on the occasion of accepting the chair of Social Resilience and Security with a study focus on Violence and Interventions at Leiden University on May 30, 2022.

This volume contains the contributions of the 21st Cross-Border Crime Colloquium webinar hosted by the Norwegian Police University College, Kongsvinger and organised 22-24 August 2021. Despite the pandemic, the Colloquium Group decided to return to the ‘criminal normal’ and the related research on (cross-border) organised crime, corruption, labour exploitation, fraud, ecological crime and the search for criminal revenues. These are partly old themes, some getting renewed attention, such a...