My own anecdotal evidence suggests that there are two classes of people with respect to sleep: those with kids under ten and the rest of us. A new Gallup survey doesn't disprove this, but it does show how the working poor and women are - surprise! - among most exhausted. The one genuine surprise: the over 65s say they are less rested than the rest of us.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.