Human beings are curious about the world in which we live. We long to know what other places look like - - the people, their culture, the animals and the plants. Today, higher levels of education and the influence of television and other communications media have combined to create in us a much greater awareness of our entire world. We are now in a global economy and our industries may be globally competitive. We must think globally. Material prosperity in many developed countries, with higher standards of living, has made travel attainable for hundreds of millions of us. Although travel can be taken for many reasons, the most common are pleasure, business and study.