Using public transportation to commute to and from work, moving from Seoul to Busan, and traveling by airplane is typical for modern individuals. However, these everyday activities have only become prevalent recently with the advancement of mobility technology. With mobility, modern individuals enjoy a more flexible and abundant lifestyle yet face the busiest and most stressful times in human history. This lecture explores the flexible life of modern individuals based on the history and evolution of mobility technology. Furthermore, it examines mobility within the economic and cultural aspects of contemporary life and illustrates how mobile devices have transformed interpersonal communication, encompassing the overall structure of modern life.