ABSTRACT
This chapter deals with a series of theories and models stemming from social movement research, criminology, social psychology, and CTS which all aim to explain individual involvement in terrorism (and/or extremism) as a matter of interaction with other individuals, the group as a whole, and/or the state. On a structure vs. agency axis, these theories are somewhere in the middle; while they consider individual preferences and choices, as well as gradual progression in time, they eventually conceptualize individual behavior as a result of either group pressure or of the norms and values adopted. In this chapter, social relations and especially norms and values play a primary role.
