Raimo Tuomela

(1940 - 2020)

In current philosophical research the term 'philosophy of social action' can be used - and has been used - in a broad sense to encompass the following central research topics: 1) action occurring in a social context; this includes multi-agent action; 2) joint attitudes (or "we-attitudes" such as joint intention, mutual belief) and other social attitudes needed for the explication and explanation of social action; 3) social macro-notions, such as actions performed by social groups and properties of social groups such as their goals and beliefs; 4) social norms and social institutions (see Tuomela, 1984, 1995). The theory of social action understood analogously in a broad sense would then involve not only philosophical but all other relevant theorizing about social action. Thus, in this sense, such fields of Artificial Intelligence (AI) as Distributed AI (DAI) and the theory of Multi-Agent Systems (MAS) fall within the scope of the theory of social action. DAI studies the social side of computer systems and includes various well-known areas ranging from Human Computer Interaction, Computer-Supported Cooperative Work, Organizational Processing, Distributed Problem Solving to Simulation of Social Systems and Organizations. Even if I am a philosopher with low artificial intelligence I will below try to say something about what the scope of DAI should be taken to be on conceptual and philosophical grounds. (In the later sections of the paper the central notion of joint intention will be the main topic - in order to illustrate how philosophers and DAI-researchers approach this issue.) Let us now consider the relationship between philosophy - especially philosophy of social action - and DAI. Both are concerned with social matters and in this sense seem to have a connection to social science proper. What kinds of questions should these areas of study be concerned with? In principle, ordinary social science should study all aspects of social life (in various societies and cultures), try to describe it and create general theories to explain it.

A person can intend to achieve his own personal aims and ends, but he can also intend to promote the goals of his groups or collectives. In many cases of collective action these two types of intention will coincide, but they need not, and when they clash, collective action dilemmas, like free-riderism, will emerge. In this paper we discuss and analyze a central kind of group-intentions termed we-intentions, and distinguish between absolute and conditional we-intentions. The analyses of the latter are then applied to a study of two related social phenomena: the agent's standing in reserve and free-riding.It is our claim that when the agent is intentionally in reserve, this involves his having a specific conditional we-intention to participate in the group's action. On the other hand, if he intends to free-ride, he intends not to participate. We also discuss and analyze different types of free-rider intentions. A person can also have a more complex intention concerning the group's action: He can have a conditional personal intention to free-ride combined with a conditional reserve member's we-intention to participate in the group's action. This may indicate that his motives are confused or mixed, but in most cases it can be taken to express his uncertainty of the fulfillment of the relevant conditions of his actions.

There are three parts and altogether fourteen chapters in the book. The parts are: I Why Action Theory Rests on a Mistake, II Dynamical Systems Theory and Human Action, and III Explaining Human Action: Why Dynamics Tells Us That Stories Are Necessary. The first part gives a survey of some historical views of causation and explanation. It also surveys current philosophical action theory especially from the point of view of its treatment of mental causation and related themes. This part is meant to be mainly introductory. Part II gives an account of dynamical systems theory, including a discussion of information theory. In this part the author also develops here own views of actions in terms of dynamical systems with a special emphasis on “second-order constraints”. In part III she gives a hermeneutical account of the explanation of action.

The paper presents an account of social institutions on the basis of collective acceptance. Basically, collective acceptance by some members of a group involves the members’ collectively coming to hold and holding a relevant social attitude (a “we-attitude”), viz. either one in the intention family of concepts or one in the belief family. In standard cases the collective acceptance must be in the “we-mode”, viz. performed as a group member, and involve that it be meant for the group. The participants must be collectively committed to what they have accepted. Social institutions are taken to be norm-governed social practices introducing a new social and conceptual status on the practices or some elements involved in those practices. This requires that some of the involved norms be constitutive norms as opposed to merely “accidentally” regulating ones. A classification of social institutions is presented. The account is broader in scope than is Searle’s.

The central topic of this paper is to study joint intention to perform a joint action or to bring about a certain state. Here are some examples of such joint action: You and I share the plan to carry a heavy table jointly upstairs and realize this plan, we sing a duet together, we clean up our backyard together, and I cash a check by acting jointly with you, a bank teller, and finally we together elect a new president for our country. In these cases the participants can be said to have a joint intention jointly or as a group to carry the table upstairs: the content of the intention involves our performing something together and the pronoun “we” refers to us, viz. you and me and the possible other participants considered together. When we jointly intend to carry the table, each of us can be said to..

In this paper the problem of the relation between belief and acceptance is discussed in view of recent literature on the topic. Belief and acceptance are characterized in terms of a number of properties, which show both the similarities and the dissimilarities between these notions. In particular it is claimed - contrary to some recently expressed views - that acceptance need not be intentional action and that the differences between belief and acceptance do not boil down to the simple view that acceptance, contrary to belief, is based on the agent's direct exercise of his will. Acceptance which is not based on intentional action is shown in the paper to be especially closely related to belief, especially to linguistic belief. Thus if a person is in a non-intentional-ly acquired and held state of acceptance that something p, he also believes that p. Another general difference is that acceptance is language-dependent while there can be non-linguistic belief. Collective beliefs and acceptances are also briefly discussed in the paper Among other things, it is noted that the notion of wide as contrasted with truth-oriented, narrow acceptance is central in the collective case.

It is argued that full-blown cooperation needs collective goals in a strong sense satisfying the "Collectivity Condition". According to this condition, a collective goal ist of the kind that necessarily, due of the goal-holders acceptance of the goal as their collective goal, if it is satisfied for one of the goal-holders it is satisfied for all the others. Not only collective goals but also other group-factors (such as possibly institutionalngroupmoden preferences and utilities) are argued to be relevant to rational cooperative solutions of collective action dilemmas.

According to scientic realism the ultimate best explanation of the facts and patterns of the framework of common sense or the \manifest image" takes place by showing that these facts and patterns are not real but that they, yet in some sense have counterparts within the scientic image explainable by the best-explaining theories. This explanation can be called eliminative explanation, for it ia part and parcel of this realist idea of explanation that the explananda become eliminated in the process of explanation. The paper investigates some types of realist explanation under the phrase `cor- rective explanation', viz. a correspondence rule account below) and a reinterpretation view ). While in them no elimination directly takes place they can be regarded as being conducive to, and giving reasons for, the ultimate elimination of the explananda.

This book develops a systematic philosophical theory of social action and group phenomena, in the process presenting detailed analyses of such central social notions as 'we-attitude' (especially 'we-intention' and mutual belief, social norm, joint action, and - most important - group goal, group belief, and group action). Though this is a philosophical work, it presents a unified conceptual framework that may be useful to social scientists, especially social psychologists, as well as philosophers. The book puts forward and defends a number of systematic philosophical theses, resulting in not only a theory of social action but, more broadly, a philosophical theory of society, or at least those aspects of society with which social psychology is supposed to deal (individuals in groups, groups, joint action, and the like).