New Books in Psychology

Between Fixed and Fickle: Why Our Moral Views Keep Changing (Harvard UP, 2026), a psychologist explains why—and how—moral views change across different life stages, situations, and historical eras.

We like to believe that moral truths are obvious and unchangeable: cheating is wrong, killing is wrong, slavery is wrong. Yet people have often cheated, killed, and enslaved without regret. The acts that feel glaringly wrong to us in the here and now can seem fine to someone who is younger, or faces different circumstances, or lived a century ago.

Why does morality appear so unstable? The popular explanation is that emotions, self-interest, and social pressure easily divert people from moral concerns because they lack sincere moral commitment. But the evidence shows otherwise. Drawing on studies of young children, adolescents, and adults, Audun Dahl argues that human morality is neither immutable nor capricious, neither fixed nor fickle. Rather, people change their moral views when they believe they have good reasons to—reasons that they can articulate to themselves and would endorse for others.

The science of moral change cannot resolve our ethical dilemmas: it does not tell us what’s morally right or wrong. But it can help us understand why we have moral views in the first place, why those views keep changing, and why moral views that seem obvious to us aren’t obvious to everyone else. Separating moral psychology from moralizing, Between Fixed and Fickle reveals what’s behind our changing agreements and disagreements as we travel toward shared and hard-won moral truths.
Host: Renee Garfinkel
Guest: Audun Dahl

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Embodied Intelligence: Multidisciplinary Perspectives on Natural, Artificial, and Hybrid Systems (MIT Press, 2026) explores a radical transformation taking place in intelligence research. Rather than focusing exclusively on brains and computer code, the book examines the important role that embodiment plays in producing intelligent, goal-directed behavior.
The book brings together experts from a range of disciplines to create conversations across fields that are often studied separately. Through these diverse perspectives, the contributors investigate how intelligence may develop and operate across different scales, physical forms and systems.
The book moves beyond the traditional divide between biological and artificial intelligence. It considers how intelligent behavior can emerge in humans, other living organisms, technological systems and unexpected forms that may not fit conventional definitions of intelligence.
By adopting a broader understanding of embodied intelligence, the contributors challenge long-held assumptions about what intelligence is, where it exists and how it manifests. This perspective could reshape how we understand ourselves, the technologies we create and the diverse forms of intelligent behavior found throughout the world.
Key Ideas:
Intelligence research is moving beyond its traditional focus on brains and computer code.
Embodiment plays an important role in intelligence and goal-directed behavior.
Intelligence can manifest across different scales, physical forms and biological or technological systems.
Collaboration among philosophy, neuroscience, psychology, biology, robotics and artificial intelligence can lead to a more complete understanding of intelligence.
Embodied intelligence challenges the traditional separation between biological and artificial systems.
Intelligent behavior may emerge in forms and places that researchers have not traditionally recognized.
A broader definition of intelligence could transform how we understand ourselves and design future technologies.
Takeaway from the Conversation:
One of the strongest ideas from the conversation is that intelligence may be far more diverse than we traditionally assume. It cannot always be understood by looking only at the brain or computer code. We must also consider the body, physical form, surrounding environment and the different ways a system pursues its goals.
Macrine and Fugate’s insights invite us to move beyond the traditional divide between biological and artificial intelligence. Whether you explore selected chapters through the book’s open-access edition for educational or research purposes or purchase the complete volume, you’ll encounter perspectives from numerous disciplines that challenge familiar assumptions and expand our understanding of where intelligence can exist, how it can emerge, and what it means to be intelligent.
About Podcast Host
Angela Marie Hutchinson is the author of “Create Your Yes! When You Keep Hearing No,” named a Forbes No. 4 book to advance your career. She is a podcast host for New Books Network, where she leads conversations for the neuroscience and Christianity channels. Hutchinson is also a talent and intellectual property executive, former social media professor and BBC commentator. She resides in Los Angeles with her husband and three children.

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Does God exist? This straightforward question has spawned endless debate, ranging from apologists’ supposed proofs of God’s existence to New Atheist manifestos declaring belief in God a harmful delusion. In Disbelief: The Origins of Atheism in a Religious Species (Prometheus Books, 2024), Will M. Gervais, a global leader in the psychological study of atheism, shows that the ubiquity of religious belief and the peculiarities of atheism are connected pieces in the puzzle of human nature.
Through a firsthand account of breakthroughs in the scientific study of atheism, including key findings from cognitive science, cultural evolution, and evolutionary psychology, Disbelief forces a rethinking of the prevailing theories of religion and reminds both believers and atheists of the shared psychologies that set them on their distinct religious trajectories.
Having grown up in the mountains of Colorado, and going to school there and later in Vancouver, Will Gervais today is a Reader in Psychology in the Centre for Culture and Evolution, Brunel University London, and Programme Lead for Brunel’s Culture and Evolution MSc Programme.
Carrie Lynn Evans is a PhD candidate at Université Laval in Quebec City. carrie-lynn.evans@lit.ulaval.ca @carrielynnland.bsky.social

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In John Charles Simon and Jennalee Donian’s Understanding Laughter and Humor: Why We Laugh, Why We Don’t, and Why It Matters (Palgrave Macmillan, 2025), the authors put forward a comprehensive new theoretical approach to understanding laughter and the humour we use to inspire it. Applying an evolutionary and biological lens to these complex and universal human behaviours, the book distinguishes itself from classical and contemporary theories by focusing not simply on laughter’s causes and effects, but on what can be gleaned from considering its communicative meaning.

At the centre of the book is the Mutual Vulnerability Theory (MVT) of Laughter, which understands laughter as a vital form of nonverbal communication, one that seeks in various ways to “lift” or “lower” moments of physical, emotional, cognitive, or social vulnerability between people. From this perspective, laughter sheds light on the social dynamics that govern human interaction, both positive and negative. It reveals the importance of vulnerability and status in our conscious and subconscious lives, while also underscoring our desire to cooperate, our respect for those who compete fairly, and our disdain for those who do not.

Wide-ranging and highly accessible, Understanding Laughter and Humor will be of interest to general readers, humour scholars, psychologists, anthropologists, comedians, and anyone curious about a seemingly mundane but vital aspect of everyday life — one intrinsic not only to human sociality, but also deeply connected to our great ape relatives and evolutionary past.

Additional content mentioned in the episode:

Understanding Laughter and Humor: A Companion and Guide, Volume 1, the first in a companion-guide series applying MVT to examples of humour and laughter across different media and formats.

John’s Psychology Today blog, Laughter and Humor 101, which expands on and explores various aspects of the Mutual Vulnerability Theory.
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In John Charles Simon and Jennalee Donian’s Understanding Laughter and Humor: Why We Laugh, Why We Don’t, and Why It Matters (Palgrave Macmillan, 2025), the authors put forward a comprehensive new theoretical approach to understanding laughter and the humour we use to inspire it. Applying an evolutionary and biological lens to these complex and universal human behaviours, the book distinguishes itself from classical and contemporary theories by focusing not simply on laughter’s causes and effects, but on what can be gleaned from considering its communicative meaning.
At the centre of the book is the Mutual Vulnerability Theory (MVT) of Laughter, which understands laughter as a vital form of nonverbal communication, one that seeks in various ways to “lift” or “lower” moments of physical, emotional, cognitive, or social vulnerability between people. From this perspective, laughter sheds light on the social dynamics that govern human interaction, both positive and negative. It reveals the importance of vulnerability and status in our conscious and subconscious lives, while also underscoring our desire to cooperate, our respect for those who compete fairly, and our disdain for those who do not.
Wide-ranging and highly accessible, Understanding Laughter and Humor will be of interest to general readers, humour scholars, psychologists, anthropologists, comedians, and anyone curious about a seemingly mundane but vital aspect of everyday life — one intrinsic not only to human sociality, but also deeply connected to our great ape relatives and evolutionary past.
Additional content mentioned in the episode:
Understanding Laughter and Humor: A Companion and Guide, Volume 1, the first in a companion-guide series applying MVT to examples of humour and laughter across different media and formats.
John’s Psychology Today blog, Laughter and Humor 101, which expands on and explores various aspects of the Mutual Vulnerability Theory.

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