Science Under Siege
How to Fight the Five Most Powerful Forces that Threaten Our World
Two of the world’s most respected scientists reveal the forces behind the dangerous anti-science movement—and show us how to fight back

Summary
From pandemics to the climate crisis, humanity faces tougher challenges than ever. Whether it’s the health of our people or the health of our planet, we know we are on an unsustainable path. But our efforts to effectively tackle these existential crises are now hampered by a common threat: politically and ideologically motivated opposition to science.
Michael E. Mann and Peter J. Hotez are two of the most respected and well-known scientists in the world and have spent the last twenty years on the front lines of the battle to convey accurate, reliable, and trustworthy information about science in the face of determined and nihilistic opposition.
In this powerful manifesto, they reveal the five main forces threatening science: plutocrats, pros, petrostates, phonies, and the press. It is a call to arms and a road map for dismantling the forces of anti-science. Armed with the information in this book, we can be empowered to promote scientific truths, shine light on channels of dark money, dismantle the corporations poisoning the planet, and ultimately avert disaster.
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Events
- Michael Mann – Science Under Siege - at Islesboro Forum (Islesboro, ME) - August 10, 2025
- Science Under Siege: A Conversation With Dr. Peter Hotez & Dr. Michael Mann - at the Baker Institute (Houston, TX) - September 9, 2025
- Michael E. Mann and Peter J. Hotez — Science Under Siege: How to Fight the Five Most Powerful Forces that Threaten Our World — at Politics & Prose (Washington D.C.) - October 2, 2025
- Michael Mann - Science Under Siege Book Signing - at UPenn Bookstore (Philadelphia, PA) - October 7, 2025
- Michael Mann - Solvathon 2025: Navigating Environmental Facts in a Post-Truth Society - at McGill university (Montreal, Canada) - October 23, 2025
- Distinguished Climate Speaker Series: Dr. Michael E. Mann - at the University of California Merced (Merced, CA) - November 17, 2025
- Future Trends Forum: Michael Mann - 50th Anniversary: CSICON 2026 - Online via Zoom - January 8, 2026
- EHE Grand Rounds: Science Under Siege - at Johns Hopkins University (Baltimore, MD) - February 13, 2026
- Michael E. Mann and Peter J. Hotez - 50th Anniversary: CSICON 2026 - at the Buffalo Convention Center (Buffalo, NY) - June 11-14, 2026
Blog Reviews
- Review of ‘Science Under Siege: How to Fight the Five Most Powerful Forces that Threaten Our World’ by Michael Mann and Peter Hotez - Climate Thoughts with Brian
- Saving Science from Disinformation, Propaganda, and Lies - Diane Ravitch's blog
Media Reviews
- A necessary and propulsive argument that offers optimism in the face of one of the world’s most destructive forces. - Kirkus Reviews
- Science under siege: battling the forces of antiscience - Brian McHugh for Yorkshire Bylines
- Suggested Reads - The Integrity Project
- Recommended Reading - The Climate Crisis Club
- An urgent call to arms to fight the dangerous anti-science movement - The Sydney Morning Herald
- Mostly Economics Podcast #20: Fighting the Anti-Vaccine, Climate Denial Machine - Center for Economic and Policy Research
- Restoring trust in science - Science Magazine
- Hiltzik: Scientists strive to be apolitical, but they can't keep politics out of their labs - Los Angeles Times and Yahoo! News
- How did assaults on science become the norm — and what can we do? - Nature
- Must Read Book Alert - the war on science and where it's coming from - Daily Kos
- The current war on science, and who’s behind it - Ars Technica
- Book Review: A Call to Arms About the Threat of Anti-Science - Undark Magazine
- Who is leading the war against science and what interest do they have - Spot Media
- Book review: Exposing the forces behind anti-science aggression - Protagonist Science
- Science Under Siege — a rallying cry against the ‘forces of darkness’ - Financial Times
- Not All Wars Are What They Seem: The False Promise of "The War on Science" - Science Matters Substack
- Two Top Scientists Tackle Trump’s Idiocracy - Mother Jones
- Book Review: A Call to Arms About the Threat of Anti-Science - Bucks County Beacon
- Book Review – Science Under Siege - Tasmanian Times
- Covid's legacy: Science on the ropes - National Business Review (NZ)
- SCIENCE UNDER SIEGE: How to Fight the Five Most Powerful Forces That Threaten Our World - AudioFile Magazine
- An Information Pandemic Is Supercharging Anti-Science Forces - Bloomberg
- The greatest books of 2025 - The Telegraph
- Best books of 2025: Environment, Science and Technology - Financial Times
- From doing science to saving science - The Lancet
- Local opinion: Science is under siege, and it must be safeguarded - Arizona Daily Star
- The best climate books to give and read over the holidays - Climate & Capital Media
- BOOK REVIEW: Science Under Siege by Michael E. Mann and Peter J. Hotez - Tillamook County Pioneer
- La science est-elle en train de devenir un sport de combat ? (Is Science Becoming a Contact Sport) - Nonfiction
- Moving Climate Change And Vaccines Out Of The Anti-Science Crosshairs - Health Affairs
- How science is being attacked by the rich - Nottingham Post
- Dr. Mann, We Read Science Under Siege. This Website Is What You're Warning About. - Unreplug.com
News
- Science is under siege from weaponised disinformation – posing a threat to human civilisation - The Guardian
- The darker agenda behind Trump’s obsession with windmills - The Boston Globe
- Dr. Peter Hotez takes the war against science very personally - Houston Public Media
- This Is the Greatest Threat to Our Human Future - Next Big Idea Club
- Antiscience Is an Existential Threat - Time Magazine
- I’m a climate scientist. Trump’s U.N. address is a fire hose of misinformation - San Francisco Chronicle
- A Climate Scientist’s Call for Hope - Truthdig
- ‘US anti-science stance poses global existential threat’ - Research Professional News
- Science is under siege. How Penn’s top climate scientist is fighting back. - The Philadelphia Inquirer
- Confronting Covid's Wake, In Practice - Science Matters Substack
- Brain drain: Here’s what can happen when scientific truths get labeled as propaganda - Arkansas Democrat Gazette
- Top U.S. oil lobby API targets landmark EU climate law, policy document shows - ExxonKnews
Interviews
- Fast Politics with Molly Jong-Fast: Evan McMorris-Santoro, Dr. Peter Hotez & Michael E. Man - Molly Jong-Fast
- 'Science Under Siege' book details ideological attacks on science - Here & Now Newsroom
- Joining Forces to Fight Anti-Science - The Brian Lehrer Show
- Action on climate change faces new threat: The doomers who think it's too late to act - Live Science
- Leading Climate and Vaccine Scientists on How to Fight Antiscience - KQED Forum
- Science Under Siege interview with The Lost in Science Team - 3CR Radio Melbourne
- ‘It’s a killing force’: How disinformation hurts Americans - Yale Climate Connections
- Michael Mann & Peter Hotez on the 'organized,' 'deliberate' political attacks on science - Velshi MSNBC
- Mann and Hotez discuss "Science Under Siege" on MSNBC "The Weekend" - The Weekend on MSNBC
- The forces behind the dangerous anti-science movement - KALW
- Dr. Peter Hotez: How to fight back in the war on science - Houston Public Media
- Science Under Siege with Prof. Michael Mann & Prof. Peter Hotez - Shirtloads of Science
- How a Texas vaccine expert tried — and failed — to get through to Kennedy - KERA News
- This Week in Science Podcast (TWIS) - Science Under Siege - This Week in Science (TWIS)
- “Science Under Siege”: Dr. Peter Hotez on Trump, Tylenol & Autism - Democracy Now! (TWIS)
- SCIENCE UNDER SIEGE & BURNED BY BILLIONAIRES: Michael Mann and Chuck Collins on Defending Truth and Democracy - Writer’s Voice
- Ignorance is the Key Ingredient That Keeps MAGAworld Believing - Background Briefing with Ian Masters
- 'Science Under Siege': Climate and pandemic experts on waging a war against anti-science - CNN "The Lead" with Jake Tapper
- The Five Most Powerful Forces That Threaten Our World - Ralph Nader Radio Hour
- How To Fight Anti-Science Forces w/ Michael Mann | MR Live - The Majority Report w/ Sam Seder
- Authors of ‘Science Under Siege’ warn of concerted effort to discredit science - PBS News Hour
- Examining the rise of the anti-science movement - CBS News
- ‘Science Under Siege’: Two Experts Sound the Alarm on Trump’s War on Science - Zeteo
- Dr Michael Mann and Dr Peter Hotez on Stand Up! With Pete - Stand Up! With Pete
- The ‘Anti-Science Disinformation Ecosystem’: Experts Decode Trump’s War on Health and Climate - Zeteo
- Five Questions with Doctors Peter Hotez and Michael Mann - Civil Discourse with Joyce Vance
- Episode 46: Science Under Siege — Michael Mann and Peter Hotez on the War Against Truth - Miles to Go
- 'Science Under Siege' warns of the dangers of the anti-science movement - WFAE 90.7
- Climate, Conspiracy, and Corruption: A Conversation with Dr. Michael Mann - Regilio v. Everything
- It's the Democracy, Stupid/The Big Picture Nov. 15 2025 - WCPT 820
- What Matters Most #1181 - Dr. Michael E. Mann - Paul Samuel Dolman
- Science Under Siege w/ Michael Mann - Talk Nerdy.
- Back Seat Socialism: Jew-Haters and Science-Deniers: Oy! - Democracy At Work
- Michael Mann on Climate Change, ‘Science Under Siege’ and Why Action Still Matters - University of Southampton
- The forces behind the dangerous anti-science movement - KALW Radio
- Science CounterPunch Ep1: Peter Hotez and Michael Mann: Science Under Siege - Bad Boy of Science
Quotes
"Pulling no punches, Michael Mann lays out our predicament and tells the shocking story of persistent climate denial and corporate deception. We are in a war for the planet, but one we are now on the verge of winning. And he deftly cuts through the propaganda and shows us the path forward."
Jerry Brown – California governor, 1975-1983, 2011-2019
"Science is indeed under siege, and that’s not good for any of us. Here, Peter Hotez and Michael Mann name names. They describe the role of Russia; the Supreme Court Justices, who’ve lost sight of the forest for the disappearing trees; and the like-minded officials who promote nutty conspiracy theories. It’s not too late to do something; it’s time to get things done. Read on."
Bill Nye, science educator
"In standing up for evidence and truth, Drs. Mann and Hotez exemplify the citizen scientists who have been integral to making our country healthier, more sustainable, and—yes—great. Science Under Siege informs us of the peril of not combatting attacks on science and scientists, and urges all of us who care about our shared future to join the fight."
Chelsea Clinton, vice chair, Clinton Foundation and Clinton Health Access Initiative
"An important contribution to the current debate about the role of science in political discourse."
Financial Times (Best Books of 2025)
"For anyone who cares about ensuring that science, facts and truth reach the public and influence decision makers to benefit society at large, Science Under Siege offers a sold frame for understanding the forces that scientists are up against and the challenges at hand."
Nature
"[Science Under Siege] is lively, accurate, and entertaining…The text is a lovely interplay between history, data, and anecdote…I recommend Science Under Siege to anyone seeking new insights into how we arrived at this moment. And I am grateful to Mann and Hotez for their advocacy, public voices, and fearlessness."
Science
"Science Under Siege is a rallying cry…recommended reading for all those who share the authors’ determination to ‘fight for a liveable planet for us, our children and future generations."
Financial Times
"An important and timely book."
Mother Jones
"If your own health matters to you, not to mention the health of the planet, read this book."
The Telegraph (UK)
"In compelling detail…the authors provide a clear, persuasive road map…The result is an empowering work in a world that can often feel lost to untruths."
Kirkus
"An impassioned critique... a call to action for scientists to get more involved in the political process and for concerned citizens to pay attention to the dangers of antiscience rhetoric."
Publishers Weekly
"Once upon a time, scientists could assume that people would take their hard work, believe it, and put it to use. No longer—as Michael Mann and Peter Hotez make painfully clear, a concentrated assault by special interests has made the work of science painful and perilous. Science Under Siege is a well-researched guide and offers some powerful ideas about how to fight back."
Bill McKibben, author of Here Comes the Sun
"Climate change and cyberattacks threaten our very survival, but an even more insidious force is eating democracy from within: disinformation. Propagandists, lobbyists, and political operatives have hijacked science, turning fact into fiction until millions of Americans reject the reality of climate change—even as wildfires rage, oceans rise, and the planet becomes increasingly uninhabitable. In Science Under Siege, Michael Mann and Peter Hotez expose the machinery behind these deadly lies and call us to fight back—before truth itself becomes collateral damage."
Nicole Perlroth, New York Times–bestselling author of This Is How They Tell Me the World Ends
"In our dark times, as we face a frontal assault on science, two revered scientists—Drs. Mann and Hotez—exemplify the warriors courageously speaking truth to power despite serious attacks."
Eric Topol, author of Deep Medicine
"The vicious and unprincipled war on science is escalating on all fronts. Now two of our most distinguished scientists, who have both been subjected to abuse and threats for their diligence and work, have documented in devastating detail the forces undermining our efforts against climate change and deadly diseases. A must-read if you care about the planet and humanity."
Norman J. Ornstein, coauthor of It's Even Worse Than It Looks
"An important and timely book."
The Lancet
