Our fascination with personality is evident in almost all parts of contemporary society. We watch movies, read books and magazines, watch our favorite sitcoms, and feel like we know the characters we meet in these settings. We are not only interested in fictional characters. Most of us have a keen interest in figuring out who we are, how to understand our connection with others, and what our place is in the world. PERSONALITY presents the theories that are the central organizing framework which help us understand what “makes us tick”. Human behavior can appear illogical, even random, but when viewed through a personality theory lens, elemental patterns emerge that theory can help us understand. Understanding personality is increasingly important in the 21st century as humankind becomes ever more connected and interdependent, and we are challenged to figure out how to live together in this global village.