Answer:
It is basically a social constructionist theory, with connections to the psychoanalytical theories of Lacan (mirror stage) and more recently, Berger and Luckmann (social constructivism).
‘The looking glass self’ is simply a neat way of saying that identity is socially constructed through interaction with others, self-perception, reflection, and life experience.
More profoundly, it is declaring that identity is not rooted in biology (DNA, genes, etc) but in complex dynamics of the social engagement. In this respect, the theory connects with poststructuralism and the work of, for example, Foucault.
