Answer the question in more than 250 words and use at least 2 sources in APA format

Psychological egoism is the view that all persons, without exception, seek their own self-interest. Ethical egoism is the view that recognizes that perhaps not all persons seek their own self-interest but all should do so. Explain whether Glaucon's argument supports psychological hedonism or ethical egoism or both. Explain whether psychological egoism implies ethical egoism.