An interaction sphere is an area that different cultures interact with trade, ideas, etc. The eastern Mediterranean and Mesopotamia are the earliest and best known. The term is used mostly in Anthropology and Economics. Globalization is the idea that all regions are now interrelated. Does this make sense?
Thank you for the response and I guess it could be expected for a professional journal to use 'terms of the art', but that one got my goat. You got to admit that it does sound like one of those buzz word generators without the background knowledge you brought forward. Thank you for the info.