Plutarch wrote on many subjects. Most popular have always been the 46 Parallel Lives, biographies planned to be ethical examples in pairs (in each pair, one Greek figure and one similar Roman), though the last four lives are single. All are invaluable sources of our knowledge of the lives and characters of Greek and Roman statesmen, soldiers and orators. Plutarch's many other varied extant works, about 60 in number, are known as Moralia or Moral Essays. They are of high literary value, besides being of great use to people interested in philosophy, ethics and religion.

The Loeb Classical Library edition of the Lives is in eleven volumes.

Kline argues that, for about twenty years after 1950, the growth of cybernetics and information theory and ever-more-powerful computers produced a utopian information narrative—an enthusiasm for information science that influenced natural scientists, social scientists, engineers, humanists, policymakers, public intellectuals, and journalists, all of whom struggled to come to grips with new relationships between humans and intelligent machines.

Kline traces the relationship between the invention of computers and communication systems and the rise, decline, and transformation of cybernetics by analyzing the lives and work of such notables as Norbert Wiener, Claude Shannon, Warren McCulloch, Margaret Mead, Gregory Bateson, and Herbert Simon. Ultimately, he reveals the crucial role played by the cybernetics moment—when cybernetics and information theory were seen as universal sciences—in setting the stage for our current preoccupation with information technologies.