About the author: William J. Bernstein is a retired neurologist, cofounder of investment management firm Efficient Frontier Advisors, and on the board of the John C. Bogle Center for Financial Literacy. He also has written a numerous books on investing, history, and social psychology. Read a section adapted with permission from McGraw Hill from Bernstein’s latest book, The Four Pillars of Investing: Lessons for Building a Winning Portfolio, below.
