Imagine a world where everybody is calculative in building relationships. In this book I model such a scenario and ask how this behavior affects the structure of social networks. Applications include friendship networks, personal business networks, R&D collaborations, strategic alliances, and trade among countries. After discussing the formal modeling approach, I put a focus on two types of linking goals. One is the gain of access to information and support by having many other actors in close reach; the other one is the bargaining position that is attained by being a broker for others. It...