Doing the research the N.Y. Times won’t do....

New Zealand is strikingly similar to Australia. Both are isolated island nations, demographically and socioeconomically similar. Their mass murder rate before Australia’s gun ban was nearly identical: From 1980 to 1996, Australia’s mass murder rate was 0.0042 incidents per 100,000 people and New Zealand’s was 0.0050 incidents per 100,000 people.

The principal difference is that, post-1997, New Zealand remained armed to the teeth – including with guns that were suddenly banned in Australia.

While it’s true that Australia has had no more mass shootings since its gun ban, neither has New Zealand, despite continuing to be massively armed.