As crises become more complex, "prevention must be at the centre of everything we do" - on the occasion of opening of the 23rd German Congress on Crime Prevention in Dresden - - Marks, Erich (International perspectives of crime prevention ; 11: Contributions from the 12th Annual International Forum 2018 within the German Congress on Crime Prevention and from the International Conference on Prevention of Violence and Extremism (PV&E), 2020)