Aesop's Fables date back to the 7th century BCE and may be the first known written expression of an often repeated proverb, namely: Necessity is the mother of invention. In the story called "The Crow and the Pitcher," during a terrible drought a thirsty crow finds water in a partially full water pitcher. But the mouth of the pitcher is too small to allow the crow to reach the water. The crow discerns that if it drops enough pebbles in the pitcher, this will raise the water level. So the crow proceeds with this plan and finally gets a drink.
Aesop's Fables come in many versions which often include a "moral" or "application" at the end. Hence, we have the summary of the lesson of the story that we recognize today.
Trouble is, it's all too easy to apply this idea to any invention and assume that "necessity" refers to some common problem that, if solved, helps the entire community or society. So, when I saw that Waymo's autonomous taxis had shut down, not once, but twice about five days apart in the same city—the first time from a power outage that darkened about one-third of San Francisco and the second due to concerns that a coming storm would create flash floods—I asked myself what necessity is pushing the deployment of autonomous vehicles forward. (To state the obvious, cars with drivers were still able to move about San Francisco during the blackout and adapt to the outage of traffic signals.)
