Evolution of sociology of life is scrutinized as an idea accumulating achievement of fundamental and special sociological theories. Building on varying interpretations of societal processes, sociology of life embraces treatment of main components, which in a certain proportion or certain aspect are present in every sociological study: social (group or individual) consciousness, behavior (activity) and surrounding macro-, mezzo- and micro-environment. This inextricable unity of consciousness, behavior, environment, when studied on empiric level, forms life world, a notion opening vistas for obtaining new knowledge in investigations fundamental and applied social problems.