Explanation:

- The phrase "Competition as 'peaceful conflict'" was described by Georg Simmel and more precisely discussed by Lewis Coser.

- Option 1: Spencer

- Herbert Spencer was a social Darwinist who talked about competition in society, but he did not specifically use the phrase "peaceful conflict."

- Option 2: Coser

- Lewis Coser, a sociologist, clearly described competition as a form of “peaceful conflict,” meaning it is a struggle between individuals or groups that doesn’t involve direct violence.

- Option 3: Weber

- Max Weber studied social action and conflict but did not coin this particular phrase.

- Option 4: Frazer

- James Frazer was an anthropologist who studied myth and religion, not known for theories of social competition.

- The correct answer is Option: 2, Coser.