Final answer:
Anomie, a term coined by Émile Durkheim, refers to a state where social norms no longer control individual behavior, often occurring during periods of great social change or uncertainty.
Step-by-step explanation:
The concept coined and popularized by Émile Durkheim that refers to a situation where social norms lose their influence over individual behavior is known as anomie. Durkheim observed that as societies transition from a state of mechanical solidarity to one of organic solidarity, there can be periods of social uncertainty where the collective consciousness weakens, leading to anomie. This normlessness can occur during times of war, economic shifts, and other changes where collective norms are unsettled and individuals may start to feel disconnected from the societal values that once guided their behavior. As society reaches an advanced stage of organic solidarity, it manages to avoid anomie by developing a new set of shared norms that guide collective life.