I was downloading Audiobooks on audible and, I came across a free excerpt of  this book: “Quiet. The power of introverts in a World That Can`t Stop Talking”.
Then I searched for Susan Cain on Ted.com and I was spot on! “The power of introverts” is the title of her talk.
She said: “…Now, in fact, some of our transformative leaders in history have been introverts. I’ll give you some examples. Eleanor Roosevelt, Rosa Parks, Gandhi — all these peopled described themselves as quiet and soft-spoken and even shy…”