

Human Nature Odyssey
Alex Leff
Human Nature Odyssey: a podcast about humanity, civilization, and the fate of the world.
You are living the latest chapter in a 10,000 year story. Join storyteller Alex Leff on a search for better ways to understand and more clearly experience the incredible, terrifying, and ridiculous world we live in.
The first stop on our quest through a landscape of ideas and stories is the 1992 novel Ishmael by Daniel Quinn about a telepathic gorilla with great hope for humanity.
You are living the latest chapter in a 10,000 year story. Join storyteller Alex Leff on a search for better ways to understand and more clearly experience the incredible, terrifying, and ridiculous world we live in.
The first stop on our quest through a landscape of ideas and stories is the 1992 novel Ishmael by Daniel Quinn about a telepathic gorilla with great hope for humanity.
Episodes
Mentioned books

Dec 4, 2025 • 38min
17 - Time Machine 2126 (Part 1): Has Green Energy Saved Us Yet?
What does a livable future look like 100 years from now? If we unlocked unlimited green energy, what would we actually do with it? And are our dreams of a renewable-energy utopia sometimes just as delusional as the fossil-fueled drill baby drill mentality? In this two-part series, Alex is joined by the hosts of Crazy Town—Jason Bradford, Rob Dietz, and Asher Miller—a research biologist, ecological economist, and Executive Director of the Post Carbon Institute, who bring a depth of knowledge as well as dad jokes. Together, they explore the implications of exponential energy growth on a finite planet, the hard truths behind a renewable-energy future, and which expectations we need to rethink as we chart a path forward. Along the way, we encounter an Olympic athlete attempting to toast bread using a bicycle. We also step inside a billionaire's latest invention: a time-travel device promising to fling us ahead one hundred years. Will the future be a gleaming techno-utopia powered by infinite green energy? A scorched wasteland of collapse? Or something else entirely—a lower-energy world that future generations might actually enjoy living in? Stay tuned for Part 2 where we take the full leap into the time machine and imagine what life a century from now could really look like in a post high-energy future. CITATIONS The Toaster Challenge, Olympic Cyclist Vs. Toaster: Can He Power It?, 2015 Tom Murphy, Galactic-Scale Energy, Do the Math, 2011. Tom Murphy, Limits to Economic Growth, Nature Physics, August, 2022. Solar Freakin' Roadways, Indiegogo, 2014 Crazy Town podcast ADDITIONAL MUSIC Modified version of "Also sprach Zarathustra, Op. 30" by Strauss, from classicals.de — licensed under CC BY 4.0 If you'd like to support Human Nature Odyssey, please subscribe wherever you enjoy your podcasts, leave us a review, and visit humannatureodyssey.com. Join us on Patreon and get exclusive access to audio extras, writings, and notes. Music: Celestial Soda Pop By: Ray Lynch From the album: Deep Breakfast Courtesy Ray Lynch Productions © Ⓟ 1984/BMI All rights reserved.

Nov 20, 2025 • 31min
Starting a Cosmic Commune: Inside Spaceship Earth and Biosphere 2
This is the first 30 minutes of a longer conversation. The full conversation is available on the Human Nature Odyssey Patreon. === In 1991, a group of artists, inventors, and visionaries set out to live inside a sealed desert enclosure for two years—a bold experiment to see if humans could survive in a self-contained environment. The project made headlines, sparked controversy, and became a cultural sensation. Spaceship Earth is the riveting documentary that tells the nuanced story of the people behind this audacious experiment. In this bonus conversation, Jake Marquez and Maren Morgan from the Death and the Garden podcast join me to explore the legacy of Biosphere 2. Together, we discuss what makes a tribe function, and why the experiment's worth revisiting today.

Oct 30, 2025 • 43min
16 - How To Survive A Zombie Apocalypse
A horrific zombie apocalypse has ravaged the world—but hardly anyone seems to notice. One lone podcast sets out to interview those navigating this strange new reality: from people attending mindful zombie retreats and binging zombie media, to those stockpiling shotguns and fortifying bunkers, to others disappearing into the woods to build something entirely new. CREDITS This is an original script written by Alex Leff VOICE ACTING CREDITS Jason Bradford Rob Dietz Jake Gibson Maia Kinney-Petrucha Jessie Lian Jake Marquez Asher Miller Maren Morgan Ray Tannheimer Maggie Weiler If you'd like to support Human Nature Odyssey, please subscribe wherever you enjoy your podcasts, leave us a review, and visit humannatureodyssey.com. Join us on Patreon and get exclusive access to audio extras, writings, and notes. Music: Celestial Soda Pop By: Ray Lynch From the album: Deep Breakfast Courtesy Ray Lynch Productions © Ⓟ 1984/BMI All rights reserved.

Oct 16, 2025 • 35min
Andor, Star Wars, Rebellion, and the Reality of Our Global Empire
This is the first 30 minutes of a longer conversation. The full conversation is available on the Human Nature Odyssey Patreon. === A long time ago, in a galaxy far, far away, there was an old Republic that, out of fear of a phantom menace, voted to consolidate authoritarian power—unknowingly sealing its own demise. It transformed into an Empire, bent on wielding its weapons of mass destruction to conquer all who dared resist. But don't worry—this is just a story. It has nothing to do with us. After all, it all happened a long time ago in a galaxy far, far away. Right? Jake Marquez and Maren Morgan are fellow podcasters, filmmakers, and friends. We continue our mid-month bonus series where we take something from the zeitgeist and view it through a broader civilizational lens.

Sep 25, 2025 • 54min
15 - Are Hunter-Gatherers Liberals or Conservatives?
What insights can our ancient past shine on our political future? Were hunter-gatherers the ultimate traditionalists—or proto-communists? Is it possible hunter-gatherers lived with greater equality and more political freedom than most societies today? And why do both communism and capitalism, despite being sworn enemies, rest on the same assumption of endless growth? Psychologist Jonathan Haidt argues that humans are wired with both liberal and conservative tendencies—and that societies function best when those forces stay in balance. Where can we find the liberal and conservative elements in our hunter-gatherer past? And how might it reframe our political future? In The King Is Dead, Now What? we explored modern political history. Now we zoom out, connecting the dots to a much broader civilizational story. Plus, we're debuting a new segment: The State of Civilization, featuring our up-and-coming optimistic reporter Jeff Opolis, reporting on the fantastic news coming from civilization right now. Everything is great! Or… is it? If you'd like to support Human Nature Odyssey, please subscribe wherever you enjoy your podcasts, leave us a review, and visit humannatureodyssey.com. Join us on Patreon and get exclusive access to audio extras, writings, and notes. Additional music for this episode by Adam Tell, from the albums Peripheries, This Time With Feeling, and Object Impermanence. Courtesy of Adam Tell. All rights reserved. CITATIONS Haidt, Jonathan. "The Moral Roots of Liberals and Conservatives." TED, 2008. Fiddler on the Roof. Directed by Norman Jewison, United Artists, 1971. "Net Energy and Sustainability, or… The Story of the Overstuffed Strongman." Crazy Town podcast, Post Carbon Institute, 2021. Ryan, Christopher. Civilized to Death: The Price of Progress. Avid Reader Press, 2019. "Ken Burns." The Joe Rogan Experience, episode 1745, Spotify, 2022. Cronon, William. Changes in the Land: Indians, Colonists, and the Ecology of New England. Hill and Wang, 1983. Marx, Karl. Critique of the Gotha Programme, 1875. Hyde, Lewis. The Gift: Imagination and the Erotic Life of Property. Vintage, 1983. Kimmerer, Robin Wall. Braiding Sweetgrass: Indigenous Wisdom, Scientific Knowledge, and the Teachings of Plants. Milkweed Editions, 2013. Norberg-Hodge, Helena. Ancient Futures: Learning from Ladakh. Sierra Club Books, 1991. Ho, Fred. A World Where Many Worlds Fit. Big Red Media, 2008. World Health Organization. (2024, July 24). Hunger numbers stubbornly high for three consecutive years as global crises deepen. Colquhoun, P. A Treatise on the Police of the Metropolis. Elhacham, Emily, et al. "Global Human-Made Mass Exceeds All Living Biomass." Nature, vol. 588, no. 7838, 2020, pp. 442–444. Music: Celestial Soda Pop By: Ray Lynch From the album: Deep Breakfast Courtesy Ray Lynch Productions © Ⓟ 1984/BMI All rights reserved.

Sep 11, 2025 • 32min
And On The Eighth Day God Created AI
This is the first 30 minutes of a longer conversation. The full conversation is available on the Human Nature Odyssey Patreon. === Jake Marquez and Maren Morgan are fellow podcasters, filmmakers, and new friends. Starting today, the three of us are joining forces to create monthly bonus episodes where we'll seek to better understanding this self-destructive civilizational 10,000 year predicament we find ourselves in. In this episode we discuss artificial intelligence. We found that despite all our philosophical overlap we were advocating two different approaches when it came to AI. I was exploring the idea of a cautious adoption, Maren argued for more of an abstinence policy. I've said it before and I'll say it again, every good conversation ends with the same conclusion: oh yeah, balance. We find ourselves there eventually. But the road we take is filled with insights, questions, and jokes.

Aug 28, 2025 • 1h 12min
Sex at Dawn, Civilized to Death, and Tangentially Speaking with Christopher Ryan
Christopher Ryan joins the odyssey to discuss human nature - shouldn't be surprising - it's in the name! What's universal, what's cultural, and what's personal? Can we really change the culture we live in? And are some societies better suited to human well-being than others? Christopher Ryan is the New York Times bestselling author of Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships as well as the book Civilized to Death: The Price of Progress. He also hosts the long-running podcast, Tangentially Speaking," which has been downloaded over 30 million times. You can learn more about Christopher here. Music: Celestial Soda Pop By: Ray Lynch From the album: Deep Breakfast Courtesy Ray Lynch Productions © Ⓟ 1984/BMI All rights reserved. 1. Amazon: Celestial Soda Pop https://amazon.com/music/player/albums/B000QQXURI 2. iTunes: https://music.apple.com/us/album/celestial-soda-pop/3242445?i=3242425 3. Spotify: https://open.spotify.com/track/2THDVIVytLuGX7S7UghuC1?si=20ea63807bba401f

9 snips
Jul 24, 2025 • 1h 3min
14 - The King Is Dead, Now What? The 250-Year Struggle for Democracy (Part 3)
Explore the remarkable journey from revolutionary France to modern political ideologies. Discover how the left/right spectrum evolved amidst pivotal events like the fall of the Berlin Wall and the rise of neoliberalism. Delve into the complexities of democracy, emphasizing the importance of inclusion and dissent. Plus, reflect on the parallels between the U.S. and Russia as both grapple with authoritarianism. This thought-provoking discussion encourages a deeper understanding of values over rigid political labels.

10 snips
Jun 26, 2025 • 54min
13 - The King Is Dead, Now What? The 250-Year Struggle for Democracy (Part 2)
In the The King Is Dead, Now What? we're exploring the history of the left / right political spectrum and the 250 year struggle for democracy. In Part 1 we started telling the story that began with the French Revolution of 1789, when those in favor of monarchy sat on the right wing of the national assembly room and those in favor of revolution sat on the left wing. In the wake of the 1848 revolutions, the struggle between left and right gave rise to three major political ideologies—conservatism, liberalism, and radicalism—each offering a distinct vision for society. These competing forces would ignite a global struggle for power. In this episode, we trace the ongoing clash between these ideologies, imagining them as bickering gods, each vying for control of the human realm. From the Russian Revolution and the collapse of monarchies after World War I to the rise of fascism, the global conflict of World War II, the Cold War standoff between the U.S. and Soviet Union, and the global youth protests of 1968, we explore how these powerful ideas collided, evolved, and continue to shape the struggle for power, equality, and freedom. If you'd like to support Human Nature Odyssey, please subscribe wherever you enjoy your podcasts, leave us a review, and visit humannatureodyssey.com. Join us on Patreon and get exclusive access to audio extras, writings, and notes. Articles Narewska, Elli. "Tsar Nicholas II Abdicates." The Guardian, March 3, 2017. Hoffmann, David L. "The October Revolution in Russia" Ohio State University Origins, 2017 "The Paris Riots of 1968, Part 1." CBC Radio, April 24, 2018. Keats, Jonathon. "Design of Dissent." Forbes, October 28, 2019. Baker, Peter. "CIA Helped Arrest Mandela." Time, February 2023. Statista. 2022. "Second World War: Share of Total Population Loss." BBC Bitesize. "The Vietnam War: Casualty Statistics." U.S. National Archives. "Vietnam War Casualty Statistics." ECPAT International. "How Many Vietnamese Died in the Vietnam War." Horner, Sam. "The Birth of the Soviet Union and the Death of the Russian Revolution." JSTOR Daily, 2021. YouTube "Days That Shook The World: Russia's Two Revolutions of 1917" Epic History. Mar 8, 2022 Films Jojo Rabbit. 2019. Directed by Taika Waititi. Music: Celestial Soda Pop By: Ray Lynch From the album: Deep Breakfast Courtesy Ray Lynch Productions © Ⓟ 1984/BMI All rights reserved.

11 snips
May 22, 2025 • 50min
12 - The King Is Dead, Now What? The 250-Year Struggle for Democracy (Part 1)
Dive into the tumultuous times of the French Revolution, where the seeds of democracy were sown amidst chaos. Discover how the concepts of left and right took root and reshaped political ideologies. The lavish lifestyle of the monarchy starkly contrasts with the revolutionaries fighting for change. Unpack the societal upheaval blending Enlightenment ideals and fierce clashes that echoed across Europe. Finally, explore the aftermath, as liberal and conservative ideologies emerged, paving the way for modern democracy amid fervent struggles.


