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Prof. Quassim Cassam - University of Warwick. Coventry, , GB

Prof. Quassim Cassam Prof. Quassim Cassam

Professor, Philosophy | University of Warwick


Quassim Cassam researches intellectual vices, post-truth, extremism, the philosophy of terrorism, and the philosophy of general practice.



Prof. Quassim Cassam Publication Prof. Quassim Cassam Publication Prof. Quassim Cassam Publication Prof. Quassim Cassam Publication Prof. Quassim Cassam Publication Prof. Quassim Cassam Publication




Conspiracy Theories and the Problem of Disappearing Knowledge | Quassim Cassam | TEDxWarwick



Areas of Expertise (10)

Philosophy of the Mind


Philosophy of Terrorism



Conspiracy Theories

Intellectual Vices


Philosophy of General Practice


Accomplishments (1)

Leadership Fellowship

2016 - Leadership Fellowship by the Arts and Humanities Research Council

Education (2)

University of Oxford: Ph.D., Philosophy 1985

University of Oxford: B. Phil, Philosophy 1982

Selected Media Appearances (4)

How conspiracy theories went mainstream

ABC News  online


Conspiracy theories like the ones about 9/11, Sandy Hook and climate change have a political agenda and should not be ignored argues philosopher Quassim Cassam. But dismantling them is no easy task...

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Lies, bullsh*t and knowledge resistance: A spotter’s guide

The Irish Times  


The latest slew of publications includes Knowledge Resistance: How We Avoid Insight from Others by sociologist Mikael Klintman; Irrationality: A History of the Dark Side of Reason by Justin EH Smith; and Vices of the Mind by prominent political philosopher Quassim Cassam. They all contribute to a field of study popularised in recent times by authors like Daniel Kahneman and Jonathan Haidt – the study of why humans think and behave in an unreasoned, or downright stupid, fashion.

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Why our political leaders make terrible decisions

New Statesman America  online


The perceived rise in “fake news” over the past few years is often discussed as though it were a natural phenomenon, like an increase in the frequency of earthquakes. Commentators have focused primarily on how the consumers of fake news might arm themselves against it. But what if the thing that really needs to change is the way the masters of disinformation think? The philosopher Quassim Cassam introduces his tightly argued book with the question of how the architects of the Iraq War convinced themselves that it would be such a triumph, and his answer is that they were personally, and culpably, defective in reason: they suffered from “vices of the mind”, which include “arrogance, imperviousness to evidence, and an inability to deal with mistakes”. These he defines as “epistemic vices”, because they are to do with one’s attitude to acquiring and maintaining knowledge...

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Intellectual vices, from Brexit to the Birmingham Six

The Irish Times  online


The Leave campaign was unconcerned about truth but Remainers showed ‘naivety and arrogance’, says philosopher Quassim Cassam...

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Selected Event Appearances (1)

Symposium on Self-Knowledge for Humans

American Philosophical Association Annual Conference  Vancouver

Selected Articles (2)

Vices of the Mind


2019 A a press conference after the U. S invasion of Iraq in 2003, Defense Secretary Donald Rumsfeld was questioned about the scenes of chaos and looting in Baghdad. “Stuff happens” was his response to indications that things weren’t exactly going according to plan. As events unfolded it was becoming increasingly clear that the architects of the invasion – Rumsfeld, President George W. Bush, Vice-President Dick Cheney and Deputy Defense Secretary Paul Wolfowitz- had seriously underestimated the potential for an Iraqi insurgency and the troop numbers needed to contain it.

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Why conspiracy theories are deeply dangerous

New Statesman

2019 Within hours of the disgraced US financier Jeffrey Epstein being found dead in his cell in August, Donald Trump was retweeting a conspiracy theory about his death. Epstein hanged himself but the original tweet by the right-wing comedian Terrence K Williams implied that the Clintons had somehow been involved in his demise. Unsurprisingly, neither Williams nor Trump produced any actual evidence in support of this suggestion. A conspiracy theory isn’t a theory like any other. The official account of the 11 September 2001 attacks is a theory about a conspiracy – an al-Qaeda conspiracy – but not a conspiracy theory. What are called “conspiracy theories” subvert received opinion and are based on the idea that things aren’t as they seem. The official account of 9/11 and the theory that the attacks were planned by the Bush administration are both theories about conspiracies but only the latter is a conspiracy theory.

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