The noosphere (also spelled noösphere) is a philosophical idea introduced by Vladimir Vernadsky, a scientist who studied Earth's systems, and Pierre Teilhard de Chardin, a philosopher and priest. Vernadsky described the noosphere as the next stage of the biosphere, calling it the "sphere of reason." This stage represents the highest level of development in the biosphere, where human thinking and rational actions play a key role.
The word "noosphere" comes from Greek words: nóos ("mind" or "reason") and sphaira ("sphere"). It is similar in structure to words like "atmosphere" and "biosphere." The concept was not created by one person alone. Vernadsky and Teilhard de Chardin developed related but different ideas: Vernadsky focused on geology, while Teilhard de Chardin focused on religious thought. Both agreed that human reason and scientific thinking have formed, and will continue to form, a new layer in Earth's geological history. This layer is part of the natural process of evolution. Later writers, mostly from Russia, expanded on Vernadsky's ideas, creating related terms such as "noocenosis" and "noocenology."
Concept
According to Vernadsky's theory, the noosphere is the third stage in Earth's development. It follows the geosphere, which includes non-living matter, and the biosphere, which includes living organisms. The appearance of life changed the geosphere, and the development of human thinking changes the biosphere. Unlike the ideas of Gaia theorists or those who support cyberspace, Vernadsky's noosphere begins when humans use nuclear processes to change elements and create new resources. This concept is studied by the Global Consciousness Project.
According to de Chardin, the noosphere forms through the interaction of human minds. As humans organize themselves into larger and more complex groups, the noosphere becomes more aware. This idea is connected to Teilhard's Law of Complexity/Consciousness, which explains how evolution works in the universe. Teilhard believed the noosphere is becoming more unified and integrated over time. He thought this process would eventually reach the Omega Point, a moment of complete unity and awareness, which he saw as the final goal of history.
Founding authors
The term "noosphere" was first used in the writings of Pierre Teilhard de Chardin in 1922 in his book Cosmogenesis. Vladimir Vernadsky likely learned about the term from a mutual friend, Édouard Le Roy, during a visit to Paris. Some sources suggest that Le Roy may have first introduced the term. Vernadsky wrote that he first heard about the concept during Le Roy’s 1927 lectures at the College of France, and that Le Roy encouraged a discussion between himself and Teilhard de Chardin about the idea. According to letters Vernadsky wrote, he based his understanding of the noosphere on Le Roy’s article titled "Les origines humaines et l’évolution de l’intelligence," specifically part III: "La noosphère et l’hominisation." He then adapted the concept for his own field, biogeochemistry. Historian Bailes notes that Vernadsky and Teilhard de Chardin influenced each other, as Teilhard de Chardin also attended Vernadsky’s lectures on biogeochemistry before developing his own idea of the noosphere.
Some accounts state that Le Roy and Teilhard de Chardin did not know about the "biosphere" concept when they first discussed the noosphere. Vernadsky is credited with introducing them to the idea of the biosphere, which was developed by Eduard Suess in 1875. Both scientists used the term "biosphere" as a foundation for their ideas about the noosphere. Despite their different backgrounds, methods, and areas of focus, Teilhard de Chardin and Vernadsky shared some key themes. Both moved beyond the natural sciences to create broad theories that included philosophy, social sciences, and accepted interpretations of evolutionary theory. They also believed that evolution has a purpose or direction and argued that human activities have become a powerful force in shaping the Earth. However, their views on the noosphere differ in important ways.