A child must be your child, step child, adopted child, foster child, brother or sister, or a descendant of one of these (for example, a grandchild or nephew).
As a broad theory, symbolic interactionism appeared in the 20-s of XX century, in the Chicago school, its founder was an American sociologist George Mead. George Herbert Mead (1863-1931) is an American sociologist and social psychologist, who is considered a true founder of symbolic interactionism.
max weber. developed the concept of the ideal type, a model against which social reality can be measured; believed that sociology should attempt to understand the meanings that individuals attach to their actions; his work influenced the development of the interactionist perspective in sociology. Symbolic interaction.