solitude matters. And for some people, it is the air they breathe." Susan Cain, author of Quiet: The Power of Introvert in a World That Can't Stop Talking, firmly believes this to be true. She also believes that introvert struggle in our society because of the deep bias against them. She says that "our most important institutions, our schools and our workplaces, they are designed mostly for extrovert, and for extrovert' need for lots of stimulation.