Until recently, it was easy to define our most widely known corporations. Any third-grader could describe their essence. Exxon sells gas; McDonald’s makes hamburgers; Walmart is a place to buy stuff. This is no longer so. Today’s ascendant monopolies aspire to encompass all of existence. Google derives from googol, a number (1 followed by 100 zeros) that mathematicians use as shorthand for unimaginably large quantities.