The theory of communication series is suggested as an alternative to discourse linguistics because it focuses not only on mass communications with reference to a thematic context, but examines every social communication including interpersonal communication between two persons or within a small group. Each element of communication is subject to three areas of (1) speech act and speech act sequences (2) communication (conversations, text-based communication) (3) series as purpose-constituted consequences of communication. Series can be recursively embedded, extending as far as society-related and international series. Series are diachronic quantities with evolutionary levels.