Introduction. -- Basic network concepts, Part I : Individual members of networks. -- Basic network concepts, Part II : whole social networks. -- Basic netowrk concepts, Part III : Network segmentation. -- The psychological foundations of social networks. -- Small gropus, leadership, and social networls: the basic building blocks. -- Organizations and networks. -- The small world, circles, and communities. -- Networks, influence, and diffusion. -- Networks as social capital. -- Ethical dilemmas of social network research. -- Coda: ten master ideas of social networks.

1. Social networks