Anaximander

Hello. My name is Anaximander, and I was one of the first people to try and explain the world using reason instead of myths. I was born around the year 610 BCE in a bustling Greek city called Miletus. Located on the coast, Miletus was a busy port where ships were always arriving and departing. Sailors and traders would bring incredible stories from faraway places like Egypt and Babylon, and hearing their tales sparked a deep curiosity in me about the wider world. I was fortunate to be a student of a very wise man named Thales, who is often called the first philosopher. He taught me the most important lesson of my life: to find answers about the world not in stories about gods, but by observing nature itself. Thales encouraged me to question everything and use my own mind to understand how things truly worked.

In my time, around the 6th century BCE, most people believed the Earth was a flat disc that floated on water or was held up by giant pillars. This idea never made much sense to me. If it was on pillars, what held up the pillars? I spent a lot of time thinking about this puzzle and eventually proposed a new, rather daring idea. I suggested that the Earth was not flat, but was shaped like a cylinder, like a short column or a drum. Even more radical was my belief that it floated freely in the center of the universe, held in place by nothing at all. My reasoning was based on balance; I argued that since the Earth was at the very center, there was no reason for it to fall in one direction more than any other. I also tried to explain the sun, moon, and stars. I imagined they were not just lights in the sky, but giant wheels of fire that surrounded the Earth. We couldn't see the fire directly, only the little bits of it that shone through holes in these invisible wheels, which appeared to us as celestial bodies moving in their great circles.

My teacher, Thales, believed that all things originally came from a single substance: water. While I respected him greatly, my observations led me to a different conclusion. I asked myself, if everything was made of water, how could its opposite, fire, exist? This question led me to propose that the source of all things was something I called the 'apeiron'. This is a Greek word that means 'the boundless' or 'the infinite'. The apeiron was not any one substance like water or air that we could see or touch. Instead, it was an eternal, undefined, and limitless source from which everything in the universe came into being. I believed that from this boundless source, fundamental opposites like hot and cold, and wet and dry, separated from each other. This process of separation, I argued, created the world as we know it. This was one of the very first attempts in history to explain the creation of the universe using a scientific concept rather than a myth about the gods.

My ideas were not limited to the vastness of the cosmos; I also applied my thinking to the world right here around us. Putting my knowledge to practical use, I created one of the very first maps of the known world around the year 550 BCE. My map showed the three continents we knew of—Europe, Asia, and the part of Africa we called Libya—with the Mediterranean Sea at the center. It was a very important tool that helped the sailors from my city navigate the seas more safely and effectively. I also thought deeply about the origins of life itself. I had seen fossils of fish and other sea creatures in the earth, far from any ocean. This evidence led me to believe that life must have started in the water. I even proposed a theory that the first humans grew inside of fish-like creatures for protection and only came onto land when they were old enough to care for themselves. While this idea sounds strange to us now, it was a pioneering attempt to think about how life might have evolved over a very long time.

I lived to be about 64 years old and passed away around 546 BCE. While many of my specific ideas about the universe—like the cylindrical Earth or the wheels of fire—were eventually replaced by new discoveries, that is the wonderful and necessary process of science. My real legacy wasn't in being correct about every detail; it was about introducing a new way of thinking. I was one of the first people to write my philosophical and scientific ideas down in a book about nature and to explain the world with logic and reason. I helped start a tradition of scientific thought that inspired generations of thinkers after me to keep asking questions and searching for answers about our amazing universe.