We live in a world in which extremism is on the rise. The 20th century was scarred by extremist movements and ideologies, and extremism continues to be a problem in the 21st century. But what exactly is extremism, and what is wrong with it? Martin Luther King Jnr. famously asked whether we will be extremists for the preservation of injustice or for the extension of justice. Is there such a thing as ‘good’ extremism or is extremism always a bad thing? This drop-in lecture will offer answers to these questions and explore the relationship between extremism and radicalism.

Based on a book written by Quassim Cassam, published by Routledge.