All over Europe, we are currently witnessing populist political parties and figures enjoying success in elections and mobilising the electorate against the supposed elite. The most recent example of this political development is the Brexit campaign in the UK, which demonstrated that populists can exert considerable influence over political decisions. Populist parties are also enjoying election successes outside Europe; this phenomenon has been occurring in the US and Latin America for a long time, for example. The new Handbook on Political Populism offers a comprehensive theoretical and empirical introduction to populist politics in Europe, the Americas and beyond. It focuses on explaining the phenomenon of populism as a consequence of the crisis of the representational system and aims to highlight the controversies and limits of current academic research and debate on the subject.