'American political life … has served again and again as an arena for uncommonly angry minds'How can a country be captured by rumours, surreal conspiracy theories and the most brazen of conmen? The historian Richard Hofstadter asked these questions in the 1960s, amid fears of rising extremism in America. Yet his dazzling dissection of the paranoid worldview – a brew of overheated exaggeration, suspicion and perceived victimhood, which can derail entire nations – is a lesson f...