Episode 04: The Democratization of Knowledge — The First Extension of the Human Brain

The corridor of an old library in Paris.

Between bookshelves that rise to the high ceiling, dust motes dance on the sunlight. Run your fingertips along the spines and the old smell of leather and paper clings to them. Books that someone read hundreds of years ago lie sleeping here. Within them remain, intact, the philosophy those people wrestled with, the science they discovered, the history they recorded.

What does it mean for us, modern people, to stand in this library? It is not simply the fact that many books are here. It is that the products of countless brains from the past now exist, physically, before my eyes. From these books I can borrow far more knowledge than my own brain's memory could ever hold.

This is the very essence of the printing revolution. The democratization of knowledge, and the externalization of the human brain's functions.

Let us recall the world before printing. A teacher's words passed into a disciple's ears, then out again through the disciple's mouth. In the oral tradition, the most important faculty was memory. The one who remembered much was wise; the one who forgot much was ignorant. Humans had to pack everything into the limited storage space of their own brains. The capacity of memory was, in effect, the limit of knowledge.

But with the arrival of the printed book, the situation changed fundamentally. We no longer needed to remember everything. Memory was delegated to an external medium called the book. The human brain, freed from its role as a storehouse, shifted into the role of interpreting, criticizing, and combining the information now stored outside it.

This was a great upheaval in the structure of human cognition. Memory became less important, and thinking became more important. As we read, we argued with the author, compared one book against another, and drew new conclusions. It was the moment when part of the human brain's function finally moved outside the body and began to merge with technology.

The library was not merely a building. It was an early form of a vast collective intelligence, made by connecting the brains of individual humans. The knowledge one person can accumulate in a lifetime is limited, but the knowledge stored in a library is as long as the history of humanity. The moment we step into a library, we can borrow the accumulated brain of humankind across thousands of years.

This is the true power that the democratization of knowledge brought. Knowledge was no longer a treasure locked inside castle walls. It became a resource that flowed like air and water, one that anyone who wished could absorb. It became possible for a commoner's son to read books and become a scholar, for a merchant's daughter to read the written word and come to define an age. Status was no longer fixed; through knowledge, it became something one could move across.

The structure of society changed as well. Printed newsletters and pamphlets created a public sphere. People gathered in coffeehouses, read newspapers, and debated the problems of society. In an age when the king's command had been absolute, a new power called public opinion was born. This was the beginning of civil society, and later the spark of the democratic revolutions.

But what does this current look like when we view it again from the perspective of artificial intelligence?

If printing moved the human brain's memory function onto an external storage device called the book, then artificial intelligence is the process of moving the human brain's thinking function onto an external processor called the machine. It is essentially the same current of evolution. Only the stage is different.

We expanded our knowledge by reading books. Now we expand our thinking by conversing with AI. If books led the democratization of knowledge, AI is leading the democratization of intelligence. The reasoning and creation that once only geniuses could perform can now be carried out even by ordinary people, through their tools.

Humans are endlessly pushing their limits outward. To supplement our legs, we invented the wheel; to supplement our eyes, we built the telescope. To supplement our memory, we made the book, and now, to supplement our thinking, we make AI.

This is not humans dominating technology. It is a process in which humans and technology co-evolve. Technology fills in human deficiencies, and humans give technology purpose and direction. Just as printing awoke humanity from the darkness of the Middle Ages, into what new world will AI awaken us?

In the eighteenth century, as the externalization of knowledge was reaching completion, humanity once again faced its limits. The mind had been expanded by books, but the body was still bound by the shackles of gravity. Farming, hauling goods, turning machines — all physical labor still depended on human muscle. A mismatch: the mind soaring while the body stayed pinned to the ground.

Humanity asked once more. This time, not about the brain, but about the body.

Why, with all this knowledge, must we still perform such grueling labor? Why must we depend only on the power of wind and water? After the liberation of knowledge came the liberation of power.

Between the ink-scented shelves, black coal smoke began to rise. The sound of a steam engine driving its pistons broke the silence of the library. If the printing revolution unlocked the shackles of the human mind, the industrial revolution unlocked the shackles of the human body.

Knowledge was now preparing to move beyond the bookshelf and into electrical signals. After the birth of the individual was complete, we were preparing to connect once again. What waits at the end of that connection?

Next: Chapter 2 — The Extension of the Body, the Industrial Revolution | The Steam Engine Replaces Human Muscle.