Inspiring leader, author of The Blue Sweater, and head of the Acumen Fund, Jaqueline Novogratz talks about immersing yourself in a cause, in a community, and asks "What is the cost of not daring? What is the cost of not trying?" in thus TED Talk:  http://www.ted.com/talks/jacqueline_novogratz_inspiring_a_life_of_immers...