Founded by Roger Eatwell (University of Bath) and Cas Mudde (University of Georgia) in 1999, the Routledge Book Series in Extremism and Democracy  covers academic studies within the broad fields of ‘extremism’ and ‘democracy’, with volumes focusing on adjacent concepts such as populism, radicalism, and ideological/religious fundamentalism. These topics have been considered largely in isolation by scholars interested in the study of political parties, elections, social movements, activism, and radicalisation in democratic settings. A key focus of the series, therefore, is the (inter-)relation between extremism, radicalism, populism, fundamentalism, and democracy. Since its establishment, the series has encompassed both influential contributions to the discipline and informative accounts for public debate. Works will seek to problematise the role of extremism, broadly defined, within an ever-globalising world, and/or the way social and political actors can respond to these challenges without undermining democratic credentials.