A central concept in the philosophy of Margaret Gilbert is “joint commitment”. It refers to the obligations people have towards others when they agree to do something together. Then each is bound to do what s/he said to do, unless the other or others relieve this person of the obligations agreed on. Gilbert uses the concept of joint commitment for understanding group action. Studying group action is about what small groups do and about what the individual members of small groups do as group members. Group action has to be distinguished from the behaviour (or actions, if you like) of organisations and within organisations and from individual action as such. It presupposes that such a thing as acting in the capacity of group member exists and that groups act because the members of a group have obliged themselves to do certain things together. An example often used by Gilbert is an agreement made by two persons to go for a walk together, for instance to a nearby park. Much can be said about the usefulness of the idea of joint commitment as a central concept for the analysis of groups, but that it helps us explaining significant aspects of what we do in groups is clear, as this quote from Gilberts book Living Together illustrates:
“Insofar as a personal decision locks you into a course of action, you yourself have the sole key needed to turn the lock. In order to unlock yourself all you need to do is to change your mind: to rescind your decision. In contrast, insofar as a joint commitment locks you into a course of action, at least two keys are required to turn the lock. You have only one of these keys. Each of the other parties has another. Changing your own mind is not enough; all must concur.” (p.295).
Man is a social being. Man cannot live on her or his own but needs other persons in order to survive or simply to do things; things that need to be done or things that are a pleasure to be done. Therefore man has to enter into agreements with others, which creates obligations. Since this is the same for all other persons, everybody is tied to others by joint commitments. Just these joint commitments and the necessity to make and to meet them makes life often so complicated, but it makes it also interesting.Source, Margaret Gilbert, “Agreements, Coercion and Obligation”, in: Living Together. Lanham, etc.: Rowman & Littlefield Publishers, 1996; pp. 281-311.