When Julius Caesar crossed the Rubicon in 49 BCE, sparking the civil war which led to the ultimate replacement of the Roman Republic with the Roman Empire, it was on horseback, leading his legions of soldiers armed with swords, spears, and other similar weapons.
When the Roman Empire in the West fell in 476 CE, after five centuries as the pre-eminent power in the ancient world, it was to Germanic armies that wielded more or less the same equipment as Caesar's legions had. When Belisarius re-captured large parts of the Western Empire in the middle of the 6th century for Emperor Justinian, he too led armies that would not have seemed unfamiliar to Caesar.
| Belisarius |
Thus, while there were certainly changes in tactics, and formations, and even to some degree materiel, the armies led by Belisarius looked much like the armies led by Caesar six centuries earlier. There was no fundamental difference.
The same cannot be said for developments in the 20th century. Admiral Jellicoe's Grand Fleet, the foundation of British Imperial might in 1914, and the victor at the Battle of Jutland in 1916, was irrelevant by the time the Second World War ended in 1945. Blockades and great naval battles between surface fleets were meaningless when compared with first with air power, as demonstrated by the sinking of the Prince of Wales and the Repulse in 1941, much less the development of atomic weapons by the end of the war - all of which came to the fore within less than a decade.
For centuries - indeed, in many respects, for millennia - human development remained relatively stagnant. Change, when it came, was generally slow and fitful.
Contrast that with my home computer. When I founded Redstar Films, just twelve years ago, I bought desktop computers for the office for my home that were near the top of the line, and which were specifically assembled by a local company. They each had 20 GB of hard drive space. The mass produced computer I'm using as I type this has 300 GB of hard drive space, and is hooked up to a separate drive that contains 500 GB of space. On the shelf nearby is another drive with a TB of space. I can edit an entire film on this computer, and post it immediately to various places on the Internet, or send it via FTP to someone in Asia, or Europe.
I could go on, but the point should be clear. Human progress has been accelerating exponentially since the beginning of the 20th century, and in particular since the end of the Second World War, at a rate that makes all of human history before then look like the slow crawl of an infant. And we haven't even really gotten started yet.
So, on the one hand, when I hear someone like Michio Kaku say that travel to the stars is far beyond our capabilities right now, and that any civilization which would have figured out how to do it must be much more advanced than us, I have to agree. It's common sense. The problem, however, comes with the timeline that he (and others) then impose for the development of that technology - not just decades, or even centuries, but millennia.
The problem is that Kaku et al assume a rate of progress for any civilization similar to human progress prior to the Twentieth Century - that is to say, slow and in fits and starts. They assume that, like Belisarius compared to Caesar, astronauts in six hundred years will more or less be using the same technology that astronauts today are using. But that doesn't seem to be the way that our development is trending. The predictive models of the past are no longer relevant.
It's possible that they're right, of course. It might even be likely. But given the way that things have gone, and are going, it cannot be said that they are certainly correct. The technological developments necessary to get us to the stars may not be thousands of years away - they may only be hundreds of years away, or perhaps even less. We just don't know anymore.
Predicting the future is a tricky thing, made trickier with each passing year.
Predicting the future is a tricky thing, made trickier with each passing year.
Accordingly, it's not unreasonable to speculate that a civilization in our nearby "galactic neighborhood" could have developed these abilities before us, and made their way here at some point, without having to imagine them as god-like beings so far in advance of us that we would not be able to recognize them, or communicate with them.
That may well be the case, but it's worth remembering that it may not.
Paul Kimball
