Final answer:
Interest groups form in response to disturbances in government and society, such as changing norms or policy debates.
Step-by-step explanation:
Disturbance theory suggests that interest groups form in response to the changing complexity of government and society. External factors, or disturbances, such as changes in social norms, environmental factors, or changes in technology, can lead to the formation of interest groups. For example, the changing norms around the use of cannabis have led to the formation of groups advocating for the legalization of marijuana.
Another example is the focus on immigration, which has resulted in the mobilization of groups both in support of and against restrictive policies. These examples demonstrate how disturbances can lead to the formation of interest groups as people respond to societal changes and policy debates.
In summary, interest groups form in response to disturbances in government and society, such as changing norms or policy debates.