 The very shoreline of the city was different before he came to power. He hammered bulkheads of steel deep into the muck beneath rivers and harbors and crammed into the space between bulkheads and shore masses of earth and stone, shale and cement that hardened into 15,000 acres of new land. His name, of course, was Robert Moses. And the writer who decided to chronicle his rise to power was a journalist named Robert Caro.