What did interactions with foreign groups bring to ancient civilizations?

With interaction with foreign groups, ancient civilizations were able to progress a lot. With regard to their literature and art, ancient civilizations were able to adapt to new ideas and make even more profound works of art. With regard to innovations, they were also able to get a lot of good ideas which they merged with their own to create new inventions. Of course with regard to trade, both parties were able to get a lot of different products from each other. 

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