Final answer:
The shift in the modal self towards individualism and uniqueness is due to cultural and societal changes that started to value a magnetic and fascinating personality as opposed to just being well-mannered and a good citizen.
Step-by-step explanation:
The shift in the modal self from being a good citizen and being well-mannered to becoming magnetic and fascinating can be attributed to changes in cultural norms and societal values. Personality psychology, which studies the traits and patterns that make individuals unique, suggests that our personalities are shaped by genetic and environmental factors. Over time, the emphasis on individualism and personal uniqueness became more valued within certain cultures, leading to the idea that possessing a striking personality is more desirable than conforming to traditional societal expectations. The role of culture is crucial in this shift as it influences what characteristics are seen as favorable. For example, Western cultures often value individualism and uniqueness, while other cultures may prioritize community and conformity.