We may now have a new “most unread best seller of all time.”

Data from Amazon Kindles suggests that that honor may go to Thomas Piketty’s “Capital in the Twenty-First Century,” which reached No. 1 on the best-seller list this year. Jordan Ellenberg, a professor of mathematics at the University of Wisconsin, Madison, wrote in The Wall Street Journal that Piketty’s book seems to eclipse its rivals in losing readers: All five of the passages that readers on Kindle have highlighted most are in the first 26 pages of a tome that runs 685 pages.

The rush to purchase Piketty’s book suggested that Americans must have wanted to understand inequality. The apparent rush to put it down suggests that, well, we’re human.

So let me satisfy this demand with my own “Idiot’s Guide to Inequality.” Here are five points:

First, economic inequality has worsened significantly in the United States and some other countries. The richest 1 percent in the United States now own more wealth than the bottom 90 percent. Oxfam estimates that the richest 85 people in the world own as much wealth as the bottom half of humanity.

The situation might be tolerable if a rising tide were lifting all boats. But it’s lifting mostly the yachts. In 2010, 93 percent of the additional income created in America went to the top 1 percent.