roads they use consume so much space and are such a danger to people. Mumford explains that the thousands of maimed and dead each year as a result of automobile accidents are a ritual sacrifice the American society makes because of its extreme reliance on highway transport. Three epochs of civilization Also discussed at length in Technics and Civilization is Mumford's division of human civilization into three distinct epochs (following concepts originated by Patrick Geddes): Eotechnic (the middle ages) Paleotechnic (the time of the industrial revolution) and Neotechnic (later, present-day) Megamachines Mumford also refers to large hierarchical organizations as megamachines—a machine using humans as its components. These organizations characterize Mumford's stage theory of civilization. The most recent megamachine manifests itself, according to Mumford, in modern technocratic nuclear powers—Mumford used the examples of the Soviet and United States power complexes represented by the Kremlin and the Pentagon, respectively. The builders of the pyramids, the Roman Empire and the armies of the World Wars are prior examples. He explains that meticulous attention to accounting and standardization, and elevation of military leaders to divine status, are spontaneous features of megamachines throughout history. He cites such examples as the repetitive nature of Egyptian paintings which feature enlarged pharaohs and public display of enlarged portraits of Communist leaders such as Mao Zedong and Joseph Stalin. He also cites the overwhelming prevalence of quantitative accounting records among surviving historical fragments, from ancient Egypt to Nazi Germany. Necessary to the construction of these megamachines is an enormous bureaucracy of humans which act as "servo-units", working without ethical involvement. According to Mumford, technological improvements such as the assembly line, or instant, global, wireless, communication and remote control, can easily weaken the perennial psychological barriers to certain types of questionable actions. An example which he uses is that of Adolf Eichmann, the Nazi official who organized logistics in support of the Holocaust. Mumford collectively refers to people willing to carry out placidly the extreme goals of these megamachines as "Eichmanns". The clock as herald of the Industrial Revolution One of the better-known studies of Mumford is of the way the mechanical clock was developed by monks in the Middle Ages and subsequently adopted by the rest of society. He viewed this device as the key invention of the whole Industrial Revolution, contrary to the common view of the steam engine holding the prime position, writing: "The clock, not the