Venture capital has drawn both supporters and detractors, as it has altered the economic fortunes of the world over the last 50 years. Today, venture capitalists have some very lofty goals. They want to fund companies that change how we shop, eat, travel, work, and more. Venture capital is revolutionizing China, and coming under fire for a lack of diversity. Author Sebastian Mallaby talks about his new book "The Power Law," and where venture capital goes from here.