Political icon and role model: Dimensions of the perceived ‘Greta effect’ among climate activists as aspects of contemporary social movement leadership

The 2019 Fridays For Future global climate strikes were extraordinary protest mobilisations in many respects, both in terms of size, age composition and the absence of a specific external triggering event. To properly understand it, one must account for Greta Thunberg's leadership role in the mobilisation – the ‘Greta effect’. We contribute to such an account by linking the ‘Greta effect’ on individual mobilisation to theories of political iconicity and political role models. Empirically, we use unique data from two waves of international surveys of participants in European Fridays For Future protests – on 15 March and 20–27 September 2019 – demonstrating that the perceived individual impact of Greta differs considerably among those who were mobilised in climate strikes. Through multilevel regression analysis, we furthermore show that (a) young women were especially prone to have been inspired and mobilised by Thunberg as a role model and (b) subjectively assessed mobilising influence by ‘Greta’ – in her capacity as a political icon – is positively related to protest participants’ instrumental motivation, sense of solidarity and collective identity. We argue that our results contribute to a better understanding of informal social movement leadership in contemporary political mobilisations.