In March 2019, a mass shooting at two Christchurch mosques, livestreamed to Facebook, resulted in the deaths of 51 people. Psychologically, this served as a focusing event with high threat salience, shocking a country unused to gun violence despite its comparatively lax firearm legislation. The unprecedented reluctance by the New Zealand media to feature the shooter as a protagonist or even publish his name, concentrating instead on victims and societal issues, helped promote a sense of collective responsibility for change. This was strongly modeled by political leaders. Within weeks, new gun control laws were introduced with bipartisan support. We present this as a national case study, considering psychological and societal enablers for legislative reform in response to extreme gun violence. The shooting also raised the intractable problem of the internet allowing terrorists to promulgate violent content and extremist ideology with regulation in this area harder to achieve than gun control.

2019 年 3 月，在 Facebook 上直播的基督城两座清真寺发生大规模枪击事件，造成 51 人死亡。从心理上讲，这是一个具有高度威胁显着性的焦点事件，震惊了一个尽管枪支立法相对宽松但不习惯枪支暴力的国家。新西兰媒体前所未有地不愿将枪手作为主角，甚至不愿公布他的名字，而是将注意力集中在受害者和社会问题上，这有助于促进集体变革的责任感。这是政治领导人强烈模仿的。几周内，新的枪支管制法在两党的支持下出台。我们将此作为一项全国案例研究，考虑为应对极端枪支暴力而进行立法改革的心理和社会推动因素。