Profits probably aren’t the first thing on Mark Zuckerberg’s mind as he makes his apology tour though Washington this week. But they are an important undercurrent to the predicament the young Facebook CEO has found himself in.
Facebook has built a highly lucrative advertising business with great speed and efficiency. That was based at least in part on some rather hopeful assumptions about human nature. As Mr. Zuckerberg noted in his first appearance before Congress on Tuesday, Facebook is an “idealistic and optimistic” company....