How has a relatively isolated continent like Oceania managed to advance technologically and build the relatively wealthy nation of Australia and have other areas such as New Guinea where technological advances are few and wealth are much less?

Oceania despite being an isolated island, has proved to be a prosperous and advance nation of Australia. Basically, because of its environment like the vast ocean that’s beside it, it has a huge amount of resources. It’s neighboring countries like New Zealand, also make trade easy for this nation.