National Security State (1977), was partly based upon his doctoral dissertation and focused on the origins of the Cold War. It was named "best book of the year" by the National Historical Society. In the mid-1970s, while a post-doctoral fellow, he began to take a particular interest in energy in his writing. Basing the book on four years of research, with Robert B. Stobaugh he co-authored and co-edited Energy Future: The Report of the Energy Project at the Harvard Business School in 1979. According to the Los Angeles Times, the book "caused a considerable stir with its optimistic view of the possibilities of energy conservation and such alternative sources as solar power." It proved to be a The New York Times bestseller, ultimately selling 300,000 copies in six languages. Within its first year of release, Yergin and Stobaugh were called to Washington, D.C. several times to testify before Congressional committees. He also advised James Schlesinger, the first US energy secretary, around the time of the Iranian revolution. According to Reuters, "since then he has given advice to every administration." 1980s–1990s He founded Cambridge Energy Research Associates (CERA) with Jamey Rosenfield in 1982 with the purchase of a $2 file cabinet from The Salvation Army. With Yergin as president, the energy research and consulting firm was created as a "quasi think-tank and source of energy industry analysis." Yergin is arguably best known for his fourth book, The Prize: The Epic Quest for Oil, Money, and Power (1991). It became a number-one bestseller that won the Pulitzer Prize for General Non-Fiction in 1992 and the Eccles Prize for the best book on economics for a general audience, selling around 700,000 copies in 17 languages. The book was adapted into a PBS/BBC series seen by around 100 million viewers both domestically and internationally, with Yergin as the principal storyteller. His next book was Russia 2010 and What It Means for the World (1993), written with Thane Gustafson, which provided scenarios for the development of Russia after the collapse of the Soviet Union. 2000s–2010s His 2002 book The Commanding Heights: The Battle for the World Economy, written with Joseph Stanislaw, described in narrative form the struggle over the "frontier" between governments and markets and the rise of globalization. In the "first major PBS series on business in more than a decade," he led the team that created an Emmy-winning six-hour PBS/BBC television series based