The thing about NZ is that in a post apocalyptic world people will just get on with things, society won't break down to any great extent.
You won't need to be able to set traps or do the economy will collapse but New Zealand is pretty self sufficient when it comes to food and energy. Domesticly sourced oil will be very expensive and obviously high end technology relies on supply chains from China so if the world turns as crap as that then it's the end of iPhones, etc. But life will go on.
Not exactly, almost everything you rely upon has a global supply chain. The tractors used for agriculture are probably not made in NZ, as their components, transformers, electrical materials, basic chemical supplies, etc.
Look around you and think where all the aluminium, iron, potash, copper, rubber, basic oils, etc. comes from. All those supply chains will be disrupted, if not eliminated completely. There is barely any self-sufficiency left in the world.
There's the capacity to make whatever mechanical equipment is required domestically as well as more aluminium than the country would require, I think most if not all of the above will be able to be manufactured.
The comment wasn't about being self sufficient and maintaining our current lifestyle, it was about being a piece of civilisation that survived an all out world war.
You won't need to be able to set traps or do the economy will collapse but New Zealand is pretty self sufficient when it comes to food and energy. Domesticly sourced oil will be very expensive and obviously high end technology relies on supply chains from China so if the world turns as crap as that then it's the end of iPhones, etc. But life will go on.