In fact marginalia have a distinguished history, going back to the scholarly glosses and rubrics for which room was specially left in early manuscripts and, after them, in the first printed books.
"If someone is washing the feet of any females ... he is in violation of the Holy Thursday rubrics, " Peters wrote in a 2006 article that he reposted earlier this month on his blog.
In our emerging G-Zero world, with no single power able to set the agenda, the winners and losers of the next generation will be determined not by the rubrics of the moment but by how well and often they are able to pivot.