The triadic legitimacy model: Understanding support to disobedient groups

In a social-psychological perspective, many scholars have argued that disobedience plays a significant role in avoiding the degeneration of the authority into autocracy and in promoting social change. In particular, the tripolar model (minority-majority-population) proposed by Mugny (1982) emphasized the role of the population for the stability or the progress of every society. Authority may indeed preserve the status quo only on the grounds of its influence on a large population. Likewise, protesters may achieve social change only by influencing and involving a large part of the population in their struggles. In understanding why people decide to join a protest, the aim of this article is to integrate Kelman and Hamilton's (1989) analysis of legitimacy with the tripolar model on social influence. The model we propose – namely the triadic legitimacy model (TLM) – explains the dialectic between social stability and social change by considering both authority's and disobedient groups' legitimacies.