Nowadays our planet is becoming more and more developed, to the point that there aren’t blank spots on a map anymore. People made efforts to discover all places on the Earth through hard conditions and misfortunes. We have planes, trains, boats cars and all other vehicles that brings us to different destinations around the world. It’s very easy to move from one country to other without any difficulties or problems. That’s why we can notice an enormous mixture of nationalities in a country. In just one nation we can meet Chinese, Vietnamese, English, French or even Indians. In this situation we must consider about the advantages and disadvantages of this phenomenon.