Tiberius

Tiberius appears in the book as a ruler whose reign illustrates how the concentration of Roman power narrowed both political participation and the prospects for innovation. He abolished the Plebeian Assembly, transferring its powers to the Senate; Roman citizens received wheat and, later, olive oil, wine, and pork, while circuses and gladiatorial contests supplied public entertainment. The contrast is central to the account: material provision and spectacle took the place of a political voice.

Rule and Political Change

The book places Tiberius’s actions in a longer institutional shift set in motion when Augustus seized power. Changes to the army made secession impossible, removing a means by which common Romans had previously secured political representation. Tiberius’s abolition of the Plebeian Assembly further reduced that voice by transferring its authority to the Senate.

This change did not simply remove an institution; it altered how imperial rule addressed ordinary citizens. Wheat distributions, later supplemented by olive oil, wine, and pork, and the provision of circuses and gladiatorial contests substituted benefits and entertainment for participation. The book presents that substitution as part of a political order increasingly able to manage citizens from above.

The Unbreakable Glass Story

An account attributed to Pliny the Elder gives a sharper illustration of Tiberius’s approach to innovation. A man invented unbreakable glass and brought it to the emperor, expecting a reward. Tiberius asked whether he had told anyone else. When the inventor said he had not, the emperor ordered him taken away and killed, fearing that the invention would reduce gold to the value of mud.

The episode reveals more than hostility to one invention. The inventor sought imperial favor rather than establishing a business to sell the glass, suggesting how strongly technological development depended on government approval. Tiberius’s response, in turn, embodies fear of creative destruction: an innovation that might disrupt existing value was suppressed rather than allowed to transform economic life.

Innovation and Imperial Power

The glass story belongs to a wider account of technological stagnation in the Roman Empire. Roman economic growth had drawn on agricultural productivity, provincial tribute, and long-distance trade, alongside technologies inherited or developed earlier. But innovation did not continue at the same pace: the book describes slow diffusion of water wheels and little change in ship design, with ships still steered by oars rather than stern rudders.

Against that background, the anecdote makes the political conditions of innovation visible. Technologies could be created and spread through state involvement, but that dependence also gave rulers the power to stop them. Tiberius’s response stands as an example of a government protecting existing arrangements from the disruptive consequences of change, even when doing so foreclosed a possible source of economic development.

Narrative Significance

Tiberius’s profile connects two forms of restriction: the loss of a public political assembly and the suppression of an invention. In the first, citizens lose a channel for representation; in the second, a creator’s new technology is extinguished before it can circulate. Together, these episodes support the book’s argument that concentrated political power can limit both political rights and the conditions for sustained economic growth.