Final answer:
An individual who desires the American Dream but resorts to selling illegal drugs is known by Robert Merton as an Innovator, as per his strain theory.
Step-by-step explanation:
A person who desires a big mansion and the perfect American Dream lifestyle, but sells illegal drugs to achieve this, is known by Robert Merton as an Innovator. The concept of an Innovator comes from Merton's strain theory, which states that society puts pressure on individuals to achieve socially acceptable goals, but they may not have the means to achieve these goals through socially acceptable ways. When an individual like the drug dealer adopts illegitimate means to reach the same goals that society values, such as wealth and success, they embody the role of the Innovator, who still values the cultural goals but rejects the institutional means of achieving them.