Podemos, the upheaval of Spanish politics and the challenge of populism.

The rise of Podemos, a political force that is ideologically and organizationally new, has shaken Spanish politics. Only three years old, and taking advantage of the dual economic and political crisis, it has managed to put an end to the two-party political system, while becoming a source of inspiration (or grounds for concern) outside of Spain. The aim of this paper is to analyse the origins of Podemos, its main characteristics (its ideology, its organization and its social bases) and the impact it has had on Spanish politics. [ABSTRACT FROM AUTHOR]