False
The terminology in discussions about cultural diversity has indeed evolved over time, but the shift from "minority and majority" to "underclass and privileged" is not accurate. The terms "minority" and "majority" are still widely used to describe demographic groups based on their population size within a given context.
However, there has been a growing emphasis on terms like "marginalized" or "underrepresented" to highlight the social, economic, and political disadvantages faced by certain groups. The terms "privileged" and "underprivileged" are also used, but they focus more on the access to resources and opportunities rather than purely demographic numbers.
For example, in discussions about racial and ethnic diversity, terms like "people of color" and "white" are often used to discuss systemic inequalities and privileges. Similarly, in socioeconomic contexts, "wealthy" and "poor" or "affluent" and "disadvantaged" might be used.
Therefore, while the language around cultural diversity is evolving, the specific shift mentioned in the question is not accurate.