Martín Portos is Research Fellow at the Scuola Normale Superiore in Florence, Italy. He is the recipient of the Juan J. Linz Best Dissertation Award in Political Science, CEPC (Government of Spain). His work appeared in international peer-reviewed journals including Acta Politica, American Behavioral Scientist, European Societies, Mobilization and Regional Studies. He is co-author of Social Movements and Referendums from Below: Direct Democracy in the Neoliberal Crisis (with D. della Porta, F. O'Connor and A. Subirats Ribas, 2017).

• Chapter 1. Grievances and protest: an introduction. - Chapter 2. The Great Recession and mobilisation in Spain: the context. - Chapter 3. Taking to the streets in the shadow of austerity: the cycle of contention in Spain, 2007–2015. - Chapter 4. The merrier, the fewer? Political dissatisfaction and protest size fluctuations in times of austerity. - Chapter 5. Unpacking the virtuous circle: aggrieved protesters, feedback effects or both at the same time? - Chapter 6. Voicing political outrage unevenly. - Chapter 7. Podemos: leaving the squares, jumping to the institutions? - Chapter 8. Conclusion: movements of crisis?