Final answer:
Karl Mannheim introduced the concept of a 'generation gap' in the 1920s and 30s, indicating how each generation develops unique perspectives influenced by their specific social and economic conditions.
Step-by-step explanation:
Karl Mannheim outlined the idea of a generation gap in the 1920s and 30s regarding young generations. He focused on how social and economic conditions differentially shape the consciousness of each new generation, allowing them to develop distinct ways of thinking and viewing the world compared to their predecessors.
This gap encompasses differences in values, behaviors, and attitudes, often leading to misunderstandings and conflict between generations.