Symbiogenesis and How Life Evolved Through Life - Reflections on Symbiotic Earth and Lynn Margulis’s Legacy

Today I had the opportunity to take part in a community screening of Symbiotic Earth, hosted by Bio4Climate, and the experience stayed with me long after the film ended. Watching the documentary together—rather than alone—made its message feel especially alive. It reminded me that the ideas at the heart of the film are not just scientific concepts, but invitations to rethink how we live, relate, and care for one another on a shared planet.

At the center of Symbiotic Earth is the life and work of Lynn Margulis, a scientist whose ideas reshaped modern biology. Margulis challenged the long-standing belief that evolution is driven primarily by competition. Through decades of persistence and collaboration, she demonstrated that symbiosis—organisms living and evolving together—is a fundamental force in the development of life. Her work in microbiology revealed that complex cells, including our own, exist because ancient bacteria formed lasting partnerships. Life advanced, she showed, not by conquest alone, but through cooperation.

What moved me most was how Margulis’s science quietly unsettles many of the stories we’ve come to accept about nature, progress, and power. If life thrives through interdependence, what does that suggest about economic systems built on extraction, or climate responses rooted in domination rather than care? The film doesn’t offer simple solutions, but it reframes the question itself: resilience may come from relationship, not control.

This is where the Bio4Climate screening felt especially meaningful. Bio4Climate’s work—across restoration, education, storytelling, and community building—is grounded in the understanding that ecosystems are living, interconnected networks. Watching Symbiotic Earth together felt like holding up a scientific mirror to that mission. The screening wasn’t just about learning something new; it was about recognizing ourselves in the science—as participants in living systems, not observers standing apart from them.

The film also portrays Margulis in a deeply human way: bold, collaborative, persistent, and unafraid to challenge convention in pursuit of truth. For those of us working at the intersection of climate, education, and community action, her story is both grounding and encouraging. It reminds us that transformative ideas often begin at the margins, grow through collaboration, and take time to be understood.

At a moment when climate conversations can feel overwhelming or abstract, Symbiotic Earth brings us back to first principles: life supports life. Watching it as a community amplified that message. It became not just a documentary, but a shared reflection on how we might move forward—more humbly, more relationally, and more attuned to the living world that sustains us.

The creator of Symbiotic Earth, John Feldman, has been a longtime friend and collaborator of Bio4Climate, and that history was deeply felt throughout the screening. His work on this film is exemplary—not only for its scientific depth and clarity, but for the care, patience, and respect with which he brings Lynn Margulis’s story to life. John’s presence at the screening made the experience especially meaningful. He engaged generously with questions, sharing insights into both the science and the long creative journey behind the film. It was a pleasure to hear his reflections, which highlighted the power of thoughtful storytelling and long-standing relationships in advancing a hopeful vision for a living planet.

Leaving the screening, I felt renewed. The film does not deny the seriousness of our environmental challenges, but it reframes them through possibility. Symbiogenesis—the idea that new life emerges when systems learn to work together—offers both a scientific insight and a hopeful guide. Beginning the year with this film, together as a community, felt like an act of alignment and optimism, grounded in how life has always evolved.