Promoting people's health must be the joint responsibility of all the social actors.

For Messagier, an artist had to be a social actor.

To this end, it is the social exchange and interaction between two or more social actors.

"Collecting" means to seek information among economic and social actors.

In a similar way, social actors need not have any embracing concept or model of what lies beyond their own home ground.

The outside world is, for the social actor, the opposite of his own home ground.

At every stage, the police and other social actors are making decisions about what action to take, based on their definition of the situation.

One social actor provides value to another one and the other reciprocates.

Effective mechanisms for interaction among all social actors are required.

Agency (sociology), the ability of social actors to make independent choices.