William J. Bernstein is a retired neurologist and cofounder of the investment management firm Efficient Frontier Advisors. He is the author of three finance books-The Intelligent Asset Allocator, The Four Pillars of Investing, and The Investor's Manifesto-and four history books, The Birth of Plenty, A Splendid Exchange, Masters of the Word, and The Delusions of Crowds. Bernstein won the prestigious James R. Vertin Award from the CFA Institute in 2017.