Humanity’s Superpower: Cumulative Cultural Intelligence, Not Just Long-Term Memory

Inspired and copied from: What is cumulative cultural evolution? Alex Mesoudi and  Alex Thornton

When we think about what makes humans unique, the usual suspects like language, tool-making, or advanced cognitive abilities often come to mind. However, a concept that might hold the key to our evolutionary success is cumulative cultural intelligence (CCI), a phenomenon that sets us apart from other animals in profound ways.

In recent years, experts have increasingly pointed to cumulative cultural evolution (CCE) as the secret behind human triumph. This concept, first popularized by scholars like Boyd, Richerson, and Tomasello in the 1990s, suggests that the ability to build upon and refine cultural knowledge across generations is the driving force behind our species’ ability to dominate the planet and create complex societies. But what exactly is cumulative cultural evolution, and why is it so vital?

What is Cumulative Cultural Evolution?

At its core, CCE refers to the way in which cultural knowledge and practices accumulate over time. It involves not only the invention of new behaviors or tools but also the modification and enhancement of these innovations by successive generations. As opposed to simple social learning, where one individual teaches another a specific skill, CCE is about building on previous knowledge. Each generation contributes something new that improves or refines the tools, practices, or beliefs of the generations before it. This continuous progression is akin to a “ratchet,” where advancements are irreversible and cannot regress to previous, less efficient states.

Why CCE Matters for Human Success

The key differentiator of CCE from other forms of learning found in the animal kingdom is the ratchet effect. Tomasello, a leading proponent of CCE, suggests that humans alone possess the ability to accumulate knowledge and improve it across generations in a way that no other species does. This is evident in how we have adapted to vastly different environments—from the Kalahari Desert to the icy tundra of the Arctic—by accumulating generations of knowledge about survival strategies, tool-making, and social structures.

One of the clearest examples of CCE is how humans create and pass on increasingly complex technologies. Consider how a modern airplane or smartphone exists due to centuries of incremental improvements based on previous designs, often with contributions from many different people. No single individual could have invented such technology alone. It is the result of the cultural evolution that builds on the past, gradually improving the design over time.

Cumulative Culture vs. Long-Term Memory

For years, many cognitive scientists and evolutionary biologists focused on long-term memory as the cornerstone of human success. The idea was that our ability to store vast amounts of information and retrieve it when needed was what enabled us to create complex societies. While long-term memory is certainly crucial, it alone cannot explain humanity’s dominance over other species. Memory can store information, but it is through the cumulative nature of cultural learning that this information is refined and improved upon across generations.

This capacity for cumulative cultural evolution is not just about preserving what we know—it’s about enhancing it, combining it with new knowledge, and making it more efficient over time. It’s not merely a storage of facts or experiences; it’s a dynamic and ever-growing process of cultural innovation.

The Debate: Is CCE Unique to Humans?

While proponents of CCE emphasize its uniqueness to humans, some studies suggest that other animals may exhibit early forms of cumulative culture. For instance, chimpanzees and crows have been shown to pass on tool-making skills and modify behaviors based on social learning. However, as researchers Alex Mesoudi and Alex Thornton note, while non-human species might demonstrate elements of CCE, the full scope of this phenomenon—especially the ratchet effect—seems to be a distinctly human trait.

The capacity for cultural adaptation in humans is unparalleled. While animals may learn from one another and develop behaviors that help them survive, humans don’t just learn—they refine, combine, and adapt knowledge in ways that no other species can. This is particularly evident in our ability to survive in diverse habitats, from the frozen tundras of the Arctic to the scorching deserts of Africa. We don’t just adapt individually; we adapt as a species through the transmission and modification of knowledge passed down over generations.

What Does CCE Mean for the Future?

The implications of cumulative cultural intelligence are profound, not only for understanding human evolution but for addressing challenges we face today. As the world becomes increasingly complex, our ability to accumulate and refine knowledge will determine our future success. From climate change to technological advancement, it is through cultural evolution—building on the knowledge of those who came before us—that humanity will navigate the challenges ahead.

Furthermore, understanding the mechanisms behind CCE can help us foster environments where innovation and learning are accelerated. In an age where information is constantly evolving, the ability to improve upon existing knowledge will be more important than ever.

Conclusion: CCE as Humanity’s Superpower

In the end, humanity’s real superpower is not simply the ability to remember or store vast amounts of information. It is our capacity for cumulative cultural intelligence: the ability to build upon the knowledge and innovations of those who came before us. This cumulative process allows us to create, adapt, and evolve in ways no other species can, giving us the flexibility and adaptability to succeed in a constantly changing world.

Our success is not just the result of individual genius or memory—it is the power of culture, passed down through generations, evolving and improving with each cycle. This is humanity’s true superpower, and it is through this cumulative cultural evolution that we continue to thrive and shape our world.