The "Kardashev Scale" has become a mainstay among futurists seeking to plot humanity's own future. But while not without its usefulness, Kardashev's model remains speculative. There's no guarantee that a high-technology ET civilization will abide by his template, however sensible it might seem. The Kardashev Scale assumes, for instance, that aliens will share our own imperialistic sensibility. In truth, they might be far less aggressive, requiring less energy than we might expect; there's no readily apparent reason why even the most resplendent of civilizations would require the resources of an entire galaxy.
One can think of any number of activities that might engage ET societies; our evident failure to observe Type III civilizations is hardly proof that ETs don't exist.
Monday, May 19, 2008
From my new SETI post: