Recent terrorist attacks have left the UK (and Europe) genuinely at sea as to how to respond to these distressing events. There are the predictable interpretations with politicians on the right talking about counter-terrorism, harsher punishments and tightening up on the internet, whilst on the political left there is talk about blaming foreign wars. All this analysis is relevant, but insufficient. Politicians are not talking enough about why so many young people are sufficiently angry and alienated that they are prepared to be seduced by the toxic and poisonous ideology of Islamic State. The Psychology of Political Extremism examines both the politics and the psychology, as well as what motivates people to behave in ways that are so disturbing. Freud is the hook as the founding father of the talking cure. A radical and subversive theorist in his time, he claimed that mankind was influenced more by the inner workings of the mind and internal conflicts than by rational thought.