solitude matters. and for some people it is the air they breathe. Susan Cain author of Quiet: The power of introverts in a world that can not stop talking firmly believes this to be true. she also believes that introverts 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 extrovers, and for extrovets' need for lots of stimulation