Today, January 16, covers the period 5.96 to 5.63 billion years ago in Logarithmic History, just over a billion years before the origin of our solar system. Back then, stars were forming at a fast clip in the Milky Way and other spiral galaxies. So let’s suppose… Suppose one of those older stars resembled the Sun, and had a planet like Earth orbiting around it – call it Urth. And suppose life originated on Urth more or less as on Earth and followed more or less the same evolutionary path. With this head start, intelligent life could have evolved a billion years ago, and today there could be intelligent Urthians (or their robot descendants) a billion years ahead of us.
There’s an urban legend that says that Einstein called compound interest the strongest force in the universe. Einstein didn’t actually quite say this, but it’s not a crazy thing to say. For example, consider how compound interest works, backward, on our Logarithmic History calendar. December 30 covers a period 5.44% longer than December 31, December 29 is 11.1% longer (because 1.0544 * 1.0544 = 1.111), and so on. At this rate of compounding we wind up with January 1 covering 751 million years. The same math implies that if we invested 1 dollar at 5.44% interest, compounded annually, then after 365 years we’d have 751 million dollars.
With even the slightest compound rate of increase, a billion year old Elder Race would have plenty of time to fill up a galaxy, and undertake huge projects like dismantling planets to capture more of their suns’ energy. Which raises the question, asked by Enrico Fermi in 1950: “Where is everybody?” There are more than 100 billion stars in our galaxies, more than 100 billion galaxies in the visible universe. If there are huge numbers of billion year old Elder Races around, why hasn’t at least one of them taken the exponential road and made themselves conspicuous?
There’s a large literature on the Fermi paradox. Here I consider just one sort of explanation. Maybe we’re one of the first intelligent species to evolve because the universe was somehow less suitable for the evolution of complex life before now. (To be continued).