The work of Sebastian Mallaby, a financial journalist and author of the new book “The Power Law,” shines a light on how Silicon Valley really operates. The names you know — Zuckerberg, Jobs, Dorsey, Brin & Page — are not really the gatekeepers of the future, he argues. The future of technology rests in the hands of people you’ve probably never heard of, such as Arthur Rock, Alan Patricof, John Dore, Don Valentine, and Marc Andreessen. They control what companies get to start up, what technology gets to market, and what your future will be like. Like so much else, it’s about following the money.