Following the fire in the Mont Blanc tunnel, a new regulation was passed requiring each tunnel of a study of its specific risks and, for the transit of dangerous goods, a comparison with the risks alternative routes. In the practical implementation of these new studies, the temptation was great to multiply and more sophisticated modeling of fires, scenario analysis, the probability calculations, the criteria for making rational choices ... Group working to develop good practices, which had both an extensive field experience and scientific instruments, has gradually converged to a specific doctrine of "reasonable use" of science by their place in the traditional arguments based on simple rules, but tough. Be described by the complex trade-offs made ​​between two logics, the logic "hyperrationnelle" and the pragmatic logic, which are always more or less tension in the regulation of risk.

While one wonders about the business of the twenty-first century and "the company post-crisis", it is useful to return to the original company of the twentieth century. Under what conditions it is born? What explains the forms that we know? And what are the foundations that could now be challenged? Berle and Means provide a historical interest, since their book The Modern Corporation and Private porperty (1932) analyzes the emergence of modern business in the early the twentieth century.