Where Are All the Dyson Spheres? A Contemplation on the Lack of Evidence for Advanced Technology in the Universe

As we contemplate the cosmos and our place in it one question crops up again and again, and has done for centuries: are we alone? So far there is no definitive evidence for an answer one way or the other, but absence of evidence is not evidence of absence ... or is it?
This short essay takes an unconventional approach to this question, while acknowledging that the final answer is still out of reach.