Social interaction, or the responses of individuals to each other, is perhaps
the basic sociological concept, because such interaction is the elementary
component of all relationships and groups that make up human society. Sociologists
who concentrate on the details of particular interactions as they occur in everyday
life are sometimes called microsociologists; those concerned with the larger patterns
of relations among major social sectors, such as the state and the economy, and
even with international relations, are called macrosociologists. (Passage adapted
from Dennis., 2001)