Final answer:
Ethical egoism is a moral theory that emphasizes individuals acting in their own self-interest. It can be useful in moral problem solving by providing a clear guideline for individuals to prioritize their own well-being. However, without established criteria, ethical egoism can be abused and may require finding creative solutions to avoid conflicts.
Step-by-step explanation:
Ethical egoism is a moral theory that advocates for individuals to act in their own self-interest. In terms of moral problem solving, ethical egoism can be useful as it provides a clear guideline for individuals to prioritize their own well-being. However, ethical egoism can be abused if there are no established criteria to determine what actions are truly in an individual's best interest. In such cases, finding creative middle ways that avoid conflicts between agents becomes necessary.