Georg Simmel was a German sociologist who wrote about the relationship between individuality and social forms in his book Individuality and Social Forms. The document summarizes some of Simmel's key ideas, including that individuals exist both within society and separate from it, and that social interaction takes various forms including exchange, conflict, and domination. Simmel analyzed how social structures and cultural forces can both promote and constrain individual freedom and expression. He also explored topics like the effects of urbanization on mental life and the tension between fashion, social conformity, and individual departure from social demands.