When two civilizations trade with each other many things can happen that can benefit both sides. Apart from exchanging items and resources that they need, it also generates income for both groups. Apart from the economic gains, trade also stimulates exchange of ideas and beliefs. When that happens, cultural practices and traditions from each groups spread to other areas. Establishment of relations beginand those bonds get stronger with every interaction. Migration also occurs and it further facilitates the exchange of cultures and ideas between the two civilizations.