In my opinion, the world became smaller and smaller. For one thing, internet is more pupular than before, people can find everything they want on the internet. If we don't konw about something, we can search it on the internet. for another thing, We can chat through the internet, even with a foreigner. Then we can understand people from different countries. Besides, now many people have to leave home because of work, they may miss their parents, then they can call their parents or they can see them through chatting tools. We even can buy things at home.