In the past, only people with a good deal of money could travel on holidays to other countries, so tourism wasn’t as important as it is today. More people travel today than in the past because there is a growing middle class in many parts of the world, that is to say, people now have more money for travel. Special air plane fares for tourists make travel less expensive and more attractive than ever before. One person doesn‘t travel for the same reason as another. But most people enjoy seeing countries that are different from their own. They also like to meet new people and new food. Tourism causes many changes in a country and in people‘s lives. People build new hotels and restaurants and train native men and women as guides to show visitors interesting places. There‘re new night clubs and other amusement. International tourism is clearly a big business. In the old days, only the rich could travel to foreign countries. More people travel today than in the past because people now have spare time for traveling. Travel by air to other countries is much more expensive and attractive today. More guides are being trained to show interesting spots. The best title of the passage is "Introductions to International Tourism".