Explanation:

- The statement “Each successive stage of change on production placed a greater restriction on the number of mates that an individual could possess” refers to the relationship between economic production and family/marriage structure.

- Option 1: Engels – Correct Answer

- Friedrich Engels discussed how changes in economic systems (like moving from primitive communism to class societies) affected marriage and family patterns, especially in his work "The Origin of the Family, Private Property and the State."

- Option 2: Marx

- Karl Marx focused more on modes of production and class struggle but didn’t specifically discuss marriage norms in this context as much as Engels did.

- Option 3: David Cooper

- Cooper was a psychiatrist and social theorist, known for work on anti-psychiatry, but not for analysis of marriage in relation to production stages.

- Option 4: T. Parsons

- Talcott Parsons was a structural functionalist focusing on social systems and the family, but his theories did not revolve around changes in production directly affecting mate restrictions.