In the Culture of Character, the ideal self was serious, disciplined, and honorable. What counted was not so much the impression one made in public as how one behaved in private. The word personality didn’t exist in English until the eighteenth century, and the idea of “having a good personality” was not widespread until the twentieth.
But when they embraced the Culture of Personality, Americans started to focus on how other perceived them. They became captivated by people who were bold and entertaining. “The social role demanded of all in the new Culture of Personality was that of a performer,” Susman famously wrote. “Every American was to become a performing self.”— Quiet: The Power of Introverts in a World That Can’t Stop Talking, page 21
And we lost a lot! By the way, this book is well worth the read. I won't be excerpting anymore from it, but if you are an introvert you must read this book and if you are an extrovert, you should read this book—if only to realize that anywhere from 30–50% of the population is introverted.