Podcast Summary

Podcast: New Books Network

Host: Yana Byers
Guest: Theodore J. Karamanski
Episode: "Great Lake: An Unnatural History of Lake Michigan"
Date: January 6, 2026
Publisher: University of Michigan Press

Episode Overview

This episode centers on historian Theodore J. Karamanski’s new book, "Great Lake: An Unnatural History of Lake Michigan." Karamanski and host Yana Byers explore the ecological, cultural, and industrial transformations of Lake Michigan, tracking how human activity—both indigenous and settler—has shaped, and continues to reshape, the lake’s natural environment. Their conversation moves from ancient glacial beginnings and Native American stewardship to industrialization, invasive species, climate change, and ongoing challenges and future prospects for this unique and beloved body of water.

Key Discussion Points & Insights

1. What Inspired the Book

• Karamanski’s Personal Connection
  • Lives and works on the lake’s shore at Loyola University Chicago; daily exposure to Lake Michigan’s varying moods.
  • Desire to write a "biography of that which was closest to me."
    • “When I look out my window every morning, there is Lake Michigan... putting on a different face depending on the weather and wind patterns. And so it was there. Unavoidable.” (03:09)

2. Defining an "Unnatural History"

• The title refers to the human-induced changes:
  • Unlike a traditional "natural history," this narrative focuses on how human actions have irreversibly altered the lake.
  • Early connection: first job at the Field Museum of Natural History, but his work here is about "the things that we as humans have done to the lake to change that which was given to us by nature." (02:39)

3. Lake Michigan’s Origins & Early Human Presence

• Geological Formation:

  • Born with the retreat of glaciers; human presence as old as the lake itself.
  • Stands out among geographic features for developing in "human time."
    • “Unlike, say, the Rocky Mountains… this is something that occurs in human time, which is amazing, right?” (04:00)

• Native American Relationship:

  • Described as spiritual and ethical rather than ecological:
    • “It’s based instead on an appreciation that all the things around them, trees, rocks, lakes, have a spiritual element, and people connect to that spirit... There’s no sense that somehow you’re exhausting a resource.” (05:30)
  • Managed to avoid overexploitation of resources through traditional rituals and beliefs.

4. Adapting to and Living With the Lake

• Early inhabitants developed watercraft and adapted to the environment, quickly exploiting aquatic resources.

• Memorable note on beaver's role:

  • Indigenous sustainable hunting shift dramatically with French fur trade’s market forces.
  • “They become enmeshed in a market economy… and gradually began to over hunt the beaver because their relationship changed from that ethical relationship to a market relationship with the product.” (09:58)

• Ecological Impact of Beaver Removal:

  • Loss of beaver dams increased sediment, impacting fish spawning grounds and later compounded by industrial logging.

5. The "Invasive Species" of European Settlement

• Karamanski provocatively flips the idea of invasives:

  • “The Europeans coming in, they are an invasive species."
    • Their paradigm (Judeo-Christian dominion) meant "subdue and conquer the earth," focusing on extraction and transformation for commercial value. (13:20)

• Rapid post-1815 settlement transitioned the region from "a few thousand inhabitants... to millions." (15:02)

6. Industrialization, Urbanization & Inequality

• The Case of Benton Harbor and St. Joseph

  • Illustrates broader regional trends:
    • Industry (shipbuilding, washing machines) once made Benton Harbor thrive.
    • Deindustrialization in late 20th c. led to economic decline, disproportionately affecting African American workers.
    • Neighboring St. Joseph shifted to tourism and recreation, resulting in stark racial and economic divide.
      • “St. Joseph thrives and grows in population... essentially white, while declining Benton Harbor is largely African American. So it’s really a microcosm of the rise of the Rust Belt as well as... Lake Michigan valued not as an industrial resource as much as it is as an amenity.” (15:54-21:23)

• Transformation of Lake Usage:

  • From busiest commercial waterway (with major industry, shipping fleets rivaling the Navy) to recreation, with pleasure crafts overwhelming commercial vessels.

7. Cascade of Invasive Species & Environmental Changes

• Industrial and navigation infrastructure—canals and shipping—brought invasive species.

  • Notable example:
    • “Today the look of Lake Michigan... is incredibly clear… that’s totally unnatural. And that’s because... 280 trillion small little bivalve muscles called quagga mussels almost completely blanketing the bottom of the lake, each filtering the water on a 24/7 basis.” (23:52-25:42)

• State-by-State Fragmentation

  • “We have allowed each one of the states to do what they want with their portion of it.” (26:09)
  • Each state treats the lake differently:
    • Indiana pollutes heavily, Michigan mines sand, Chicago diverts water, Wisconsin farms flush fertilizer—all with ecological consequences.

8. Climate Change Impacts

• Noticeable changes already: fluctuating lake levels, more extreme weather, milder winters.

  • “It’s interesting that in a lot of ways we’re just beginning to see that…” (28:55)
  • Long-term, the region may become desirable as climate instability elsewhere increases.

• Growing nostalgia for severe winters now rare within a single lifetime:

  • “Throw away the ice skates because you don’t have much chance to use them anymore.” (31:00)

9. Resilience and Majesty of the Lake

• Despite human alterations, the lake remains wild and dangerous:

  • “If you step off a lakeshore dock onto a boat or you wade into the lake from a beach, you are entering an alien landscape… it has the power of a wilderness.” (31:54-32:32)
  • The need for direct engagement to foster appreciation and stewardship.
  • The danger from distance: those who live near but never see the lake may not value it.

• Call for Stewardship:

  • The book aims to foster appreciation and responsibility among these would-be stewards.
    • “…lots of people who make the effort to be on the lake, to interact with the lake, and they’re the stewards of the lake for the future... I was attracted to write this book in part to enhance people’s appreciation of this great natural resource so that they can become stewards of the waters as well.” (33:58-35:43)

Notable Quotes & Memorable Moments

• On Lake Michigan’s Uniqueness:
  • "This one's unique in that it has always had an interaction with the human presence because people came here as the glaciers were melting, and those melting glaciers created the lake." (04:00)
• On Spiritual vs. Ecological Relationships:
  • "It's not an ecological relationship. It's based instead on an appreciation that all the things around them, trees, rocks, lakes, have a spiritual element, and people connect to that spirit." (05:30)
• On Invasive Europeans:
  • "The Europeans coming in, they are an invasive species." (13:20)
• On Industrial Decline:
  • "...last hired, first fired. And so Benton Harbor became increasingly racially segregated... while declining Benton Harbor is largely African American." (15:54)
• On Quagga Mussels and Unnatural Clarity:
  • "On the bottom of Lake Michigan are somewhere around 280 trillion small little bivalve muscles called quagga mussels almost completely blanketing the bottom of the lake, each filtering the water on a 24/7 basis." (25:42)
• On Resilience and Wilderness:
  • "You are entering an alien landscape. You are entering into a place that is... a powerful, unforgiving natural force... it still is an untamed and therefore majestic piece of the environment." (31:54-32:32)
• On Urban Disconnection:
  • "In a place like Chicago... you go for years without seeing the lake. I mean, your water that you're drinking, that's all coming from the lake, but you just take that for granted." (33:58)

Important Timestamps

• 01:35 – Karamanski on writing the book and his personal connection
• 02:39 – Why an "unnatural" history
• 04:00 – Lake Michigan's formation; unique human interaction
• 05:30 – Indigenous relationships to the lake
• 09:58 – The ecological chain reaction of the beaver trade
• 13:20 – Framing Euro-Americans as invasive species
• 15:54 – The parable of Benton Harbor and St. Joseph
• 21:57 – Decline of commercial fleets, rise of recreation
• 23:52 – Invasive species and transforming ecosystems
• 26:09 – Inter-state governance and environmental disparities
• 28:55 – Climate change impacts
• 31:00 – Milder winters—climate observed within a generation
• 31:54 – The enduring wildness of Lake Michigan
• 33:58 – Urban disconnect and the need for stewardship
• 35:57 – Karamanski’s upcoming project: Historical atlas of the Great Lakes

Conclusion

This episode offers a rich, compelling exploration of Lake Michigan’s past and present, blending personal stories, social critique, and environmental science. Karamanski’s "unnatural history" presents Lake Michigan as a dynamic, endangered yet resilient force—one that mirrors broader American struggles with nature, industry, and inequality. The conversation leaves listeners with both a heightened appreciation of the lake’s grandeur and a call to become stewards of its future.