In accordance with the definition of business actor and business role in Archimate (Chapt. 4) an actor is defined as an entity capable of (actively) performing behaviour, and a role is defined as a named specific behaviour of an actor participating in a particular context (typically a collaboration (ref. Archimate's business collaboration) or interaction; ref. Interaction Dictionary.)
Actors at the levels micro, meso and macro are socially created as legal person with varying claims on resources and duties. (Societal) Architecture Principles would typically capture the variation of these claims in relationship to the kind of assets.