Quelques repéres historiques sur la théorie des jeux

Résumé  L'article s'attache à dégager le fil rouge qui relie les réflexions de Wilhelm Gottfried Leibniz sur les jeux de société à la théorie des jeux, telle qu'on la trouve dans l'ouvrage de John Von Neumann et Oskar Morgenstern. L'itinéraire décrit passe par les travaux de plusieurs mathématiciens du XVIII^e siècle sur différents jeux de hasard, pour aboutir aux recherches de quelques-uns des fondateurs des mathématiques modernes, comme Ernst Zermelo pour la théorie des ensembles et émile Borel pour la théorie des probabilités. II montre comment une analyse mathématique des jeux de société a débouché sur l'élaboration d'une grille générale d'analyse des phénomènes sociaux. Son cheminement révèle, en outre, la longue parenthèse du XIX^e siècle où ce programme s'est trouvé abandonné et esquisse, en conclusion, quelques hypothèses pour l'expliquer. The paper strives to find the clue which links Leibniz' thoughts on parlour games to the mathematical theory of games in John Von Neumann and Oskar Morgenstern.Magna opera the way goes through the works of several XVIII^th century mathematicians on various games of chance to reach the research of some of the modern mathematics founders, as Ernst Zermelo for the sets theory and émile Borel for the theory of probabilities. The paper shows how a mathematical analysis of parlour games ends at a general framework to study the social phenomena. Its development also reveals how this research program has disappeared, all along the XIX^th century, and suggests, in conclusion, some tentative explanations of this development. Une version préliminaire de cet article a été publiée dans la revue de l'Association historique des élèves du lycée Henri IV,Jeu et histoire, n^o spéc.:L'émoi de l'histoire, 25–26, printempsautomne 2002, p. 94–115.     

Suicides of German Jews in the Third Reich

This article re-examines Jewish responses towards Nazi racismby studying German-Jewish suicides. Its purpose is twofold.First, it moves beyond the discussion of suicide as a statisticalincidence and asks what motivated German Jews to commit suicide.Statistics, however elaborate, disregard individual fates andcircumstances. While not entirely dismissing suicide statistics,this article is primarily concerned with qualitative questionsof social context and individual motives. It introduces hithertoneglected archival sources, including suicide notes. These sourcesallow us to assess the impact of Nazi racial policies on individualsuicides and to study the emotional effect of Nazi policieson German Jews. This article also takes up the question as tohow far, if at all, German-Jewish suicides can be considereda form of resistance towards Nazism and to what extent theywere an act of despair and hopelessness. The Nazis claimed tobe the arbiters over the lives of Jews once the deportationsstarted in 1941. The vast majority of Jews left in Germany afterNovember 1938 were fairly elderly. They could not be expectedto go into hiding, and their will to live may have been less,as was, undoubtedly, the ability or desire to start a new lifeelsewhere. In this bleak context, the overwhelming majorityof German-Jewish suicides derived from personal despair andthe desire to preserve individual dignity and agency. Nazi racialpolicies coalesced in a condition of anomie, an overturningof normal life and its norms and values that increases the likelihoodof suicide, prompted by the collapse of hope in the possibilityof a future. Emile Durkheim originally developed the conceptof anomic suicide as a way to explain suicide as a social phenomenon.This concept helps us understand the suicides of German Jewsin the Third Reich both in their wider political and privateimplications.     

The Sociopolitics of Archaeology in Quebec: Regional Developments within Global Trends

In the 1960s, archaeology was a newcomer to Quebec’s cultural francophone scene, and commercial archaeology made its first appearance at the end of the 1970s. Today, in a context of global chronic economic crisis, we intend to examine the effects of provincial and federal ideological and economic trends on the praxis of archaeology in Quebec. These include a progressive deregulation of the public sector by weakening the institutions through the termination of archaeological posts or/and non-replacement of retired archaeologists, and a progressive disengagement of the public sector through conditional regulation, accompanied by a lax attitude towards entrepreneurs, and stickler regulations for archaeologists. We present a series of current issues and examples in Quebec archaeology which illustrate these trends, in particular two case studies occurring in Montreal and Northern Quebec, respectively.     

Forests for cotton: Institutions and organizations in Brazil's mid-twentieth-century cotton boom

The western region of São Paulo state, Brazil, became one of several sites of global cotton production during the first half of the twentieth century in response to increased global demand and fears of cotton shortages. The cotton boom tapped a ‘forest rent’ that helped Brazil rise to become the largest producer in Latin America, providing both export revenue and critical raw material to a growing industrial economy that would become the largest in South America. This paper uses an organizational and institutional perspective to analyze causes and effects of the mid-century cotton boom that centered on São Paulo state. Organizations and institutions relating to cotton production are considered using oral histories, judicial documents, agronomic texts, and the sediment record in small catchments as empirical evidence. The state dramatically reformed some organizations to provide the key inputs to cotton production, while most contemporary observers ignored institutions, such as sharecropping and tenant farming, that supported cotton. São Paulo's institutions and organizations were characterized by the borrowing and adaptation of existing labor institutions, the creation of new state organizations that subsidized elite producers, and the weak development of institutions or organizations in response to soil fertility issues and labor supply.