Which source is NOT listed as a cause of conflict according to Bell and Hart?

The source listed as "Shared interests" is not identified by Bell and Hart as a cause of conflict. In the context of conflict management and resolution, shared interests generally represent points of agreement or mutual benefits that can serve to unify parties rather than divide them. When individuals or groups have common goals or values, it can facilitate collaboration and mitigate potential conflicts.

On the other hand, conflicting styles, conflicting perceptions, and conflicting resources are well-recognized sources of conflict. Conflicting styles refer to the different approaches people take in communication or decision-making, which may clash and lead to misunderstandings. Conflicting perceptions involve the different ways individuals interpret situations and events, which can cause disagreement and tension. Conflicting resources focus on competition for limited assets or opportunities, creating a scenario where individuals or groups vie against each other for what they perceive as scarce resources. These factors inherently create friction and conflict, making them significant causes in the realm of conflict studies.