Greeks and Romans were notorious in their disdain for technology. Aristotle noted that to be engaged in the mechanical arts was "illiberal and irksome." Seneca infamously characterized invention as something fit only for "the meanest slaves." The Roman Emperor Vespasian rejected technological innovation for fear that it would lead to unemployment.
Greek and Roman economies were built on slavery. Strabo described the slave market at Delos as capable of handling the sale of 10,000 slaves a day. With an abundant supply of manual labor, the Romans had little incentive to develop artificial or mechanical power sources. Technical occupations such as blacksmithing came to be associated with the lower classes.
With the collapse of the Western Roman Empire in the fifth century AD, a Dark Age in philosophy and science descended upon the Mediterranean region. But the unwritten history of technological progress continued. In northern and western Europe, there was never a period of regression. As early as 370 AD, an unknown author noted the "mechanical inventiveness" of the "barbarian peoples" of northern Europe. The Christian ethic of universal brotherhood slowly spread through Europe, and slavery began to disappear. Tribes and peoples became united under a common creed. Europeans not only embraced technology, but they