Think about your personal goals. Now think about what you have to do in order to achieve them. No matter what that goal is, it will probably involve a network of people. In order to get a better job, you have to be able to communicate well with others and to work well in a team. To learn a new skill, you'll need to have other people to practice with. And in order to begin a strong friendship or relationship, you'll need to have good social skills. We all need good relationships with other people to be our best and to do our best.