The book is an interdisciplinary exploration of the nature of delusions. It brings together recent work in philosophy of mind, cognitive psychology and psychiatry, offering a comprehensive review of the philosophical issues raised by the psychology of normal and abnormal cognition.

This open access book offers an exploration of delusions—unusual beliefs that can significantly disrupt people’s lives. Experts from a range of disciplinary backgrounds, including lived experience, clinical psychiatry, philosophy, clinical psychology, and cognitive neuroscience, discuss how delusions emerge, why it is so difficult to give them up, what their effects are, how they are managed, and what we can do to reduce the stigma associated with them. Taken as a whole, the book proposes that there is continuity between delusions and everyday beliefs. It is essential reading for researchers working on delusions and mental health more generally, and will also appeal to anybody who wants to gain a better understanding of what happens when the way we experience and interpret the world is different from that of the people around us.

Delusions play a fundamental role in the history of psychology, philosophy and culture, dividing not only the mad from the sane but reason from unreason. Yet the very nature and extent of delusions are poorly understood. What are delusions? How do they differ from everyday errors or mistaken beliefs? Are they scientific categories? In this superb, panoramic investigation of delusion Jennifer Radden explores these questions and more, unravelling a fascinating story that ranges from Descartes’s demon to famous first-hand accounts of delusion, such as Daniel Schreber’s Memoirs of My Nervous Illness. Radden places delusion in both a clinical and cultural context and explores a fascinating range of themes: delusions as both individually and collectively held, including the phenomenon of folies á deux; spiritual and religious delusions, in particular what distinguishes normal religious belief from delusions with religious themes; how we assess those suffering from delusion from a moral standpoint; and how we are to interpret violent actions when they are the result of delusional thinking. As well as more common delusions, such as those of grandeur, she also discusses some of the most interesting and perplexing forms of clinical delusion, such as Cotard and Capgras.

‘Fascinating and compassionate’ Horatio Clare The King of France – thinking he was made of glass – was terrified he might shatter…and he wasn’t alone. After the Emperor met his end at Waterloo, an epidemic of Napoleons piled into France’s asylums. Throughout the nineteenth century, dozens of middle-aged women tried to convince their physicians that they were, in fact, dead. For centuries we’ve dismissed delusions as something for doctors to sort out behind locked doors. But delusions are more than just bizarre quirks – they hold the key to collective anxieties and traumas. In this groundbreaking history, Victoria Shepherd uncovers stories of delusions from medieval times to the present day and implores us to identify reason in apparent madness.

This “disturbing yet fascinating” exploration of mass mania through the ages explains the biological and psychological roots of irrationality (Kirkus Reviews). From time immemorial, contagious narratives have spread through susceptible groups—with enormous, often disastrous, consequences. Inspired by Charles Mackay’s nineteenth-century classic Memoirs of Extraordinary Popular Delusions and the Madness of Crowds, neurologist and author William Bernstein examines mass delusion through the lens of current scientific research in The Delusions of Crowds. Bernstein tells the stories of dramatic religious and financial mania in western society over the last five hundred years—from the Anabaptist Madness of the 1530s to the dangerous End-Times beliefs that pervade today’s polarized America; and from the South Sea Bubble to the Enron scandal and dot com bubbles. Through Bernstein’s supple prose, the participants are as colorful as their “desire to improve one’s well-being in this life or the next.” Bernstein’s chronicles reveal the huge cost and alarming implications of mass mania. He observes that if we can absorb the history and biology of this all-too-human phenomenon, we can recognize it more readily in our own time, and avoid its frequently dire impact.

Sex discrimination is supposedly a distant memory. Yet popular books, magazines and even scientific articles defend inequalities by citing immutable biological differences between the male and female brain. Why are there so few women in science and engineering, so few men in the laundry room? Well, they say, it's our brains.

It’s tempting to think that we live in an unprecedentedly fertile age for conspiracy theories, with seemingly each churn of the news cycle bringing fresh manifestations of large-scale paranoia. But the sad fact is that these narratives of suspicion—and the delusional psychologies that fuel them—have been a constant presence in American life for nearly as long as there’s been an America. In this sweeping book, Thomas Milan Konda traces the country’s obsession with conspiratorial thought from the early days of the republic to our own anxious moment. Conspiracies of Conspiracies details centuries of sinister speculations—from antisemitism and anti-Catholicism to UFOs and reptilian humanoids—and their often incendiary outcomes. Rather than simply rehashing the surface eccentricities of such theories, Konda draws from his unprecedented assemblage of conspiratorial writing to crack open the mindsets that lead people toward these self-sealing worlds of denial. What is distinctively American about these theories, he argues, is not simply our country’s homegrown obsession with them but their ongoing prevalence and virulence. Konda proves that conspiracy theories are no harmless sideshow. They are instead the dark and secret heart of American political history—one that is poisoning the bloodstream of an increasingly sick body politic.