Perennialists believe that one should teach the things that they believe are of everlasting importance to all people everywhere. They believe that the most important topics develop a person. Since details of fact change constantly, these cannot be the most important. Therefore, one should teach principles, not facts. Since people are human, one should teach first about humans, not machines or techniques. Since people are people first, and workers second if at all, one should teach liberal topics first, not vocational topics.