Character versus Personality
“To some extent, we’ve always had an admiration for extroversion in our culture. But the extrovert ideal really came to play at the turn of the 20th century when we had the rise of big business. Suddenly, people were flocking to the cities, and they were needing to prove themselves in big corporations, at job interviews and on sales calls […] We moved from what cultural historians call a culture of character to a culture of personality. During the culture of character, what was important was the good deeds that you performed when nobody was looking. Abraham Lincoln is the embodiment of the culture of character, and people celebrated him back then for being a man who did not offend by superiority. But at the turn of the century, when we moved into this culture of personality, suddenly what was admired was to be magnetic and charismatic. At the same time, we suddenly had the rise of movies and movie stars. Movie stars, of course, were the embodiment of what it meant to be a charismatic figure. So, part of people’s fascination with these movie stars was for what they could learn from them and bring with them to their own jobs.”
This is from an interview with Susan Cain, who wrote the great book Quiet: The Power of Introverts in a World that Can’t Stop Talking.