What differentiates old world wines versus new world wines?

QUESTION: What differentiates old world versus new world wines? This is a question that does not have a consensus in the wine business. It used to be that countries like France were old world and New Zealand were new world. In general, these arguments can still stand. New Zealand really is a new wine producing country. However, it gets into murky water. Some people would consider South Africa, Chile, Argentina, Australia, Spain, Lebanon and Portugal as new world producers.

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