Health is a multidimensional construct that is determined by the interplay of different network levels and fields of action. Wiebke Bruns explores both theoretically and empirically—taking into account the various network levels—the question of under what assumptions the development and expansion of health-promoting resources occurs at different network levels, and to what extent the positive influence of social networks can be systematically utilized for health promotion. The empirical analysis is based on the example of the Brazilian health system, which employs network terminology and is oriented towards the policy guidelines of the WHO.