Probability, Prudence, Danger: Thomas Aquinas On The Building Of The Lexicon Of Risk

The Latin terms commonly used to signify “risk” are absent from Thomas Aquinas’s economic writings. Instead, Aquinas offers a lexicon of probability, prudence, and danger. This ternary lexicon brings with it a triple universalization of risk: first, a universalization through activity, including the activity of analysis considered as part of economic activity; second, a universalization through the agents, since everyone—the observer, the co-contractors, the prince, and the population—is affected by the risk; and, third, a partial universalization of its definition, since the lexicon indicates a risk that is not yet restricted by calculation, as the modern notion is, although some distinctions are already made by Aquinas. However, the lexicon describes only a risk of loss and does not take into account chance of gain.