Nicholas Carr started his blog “Rough Type” in 2005, when MySpace was a fast-growing social networking site and Facebook was a Palo Alto startup. Now in his book “Utopia Is Creepy and Other Provocations,” he has collected the best of those posts and added influential essays such as “Is Google Making Us Stupid?” and “Life, Liberty, and the Pursuit of Privacy,” which were published in such magazines and sites as The Atlantic, the Wall Street Journal, and Politico. Carr’s favorite targets are zealots who believe so fervently in computers and data that they abandon common sense. Cheap digital tools, he says, do not make us all the next Fellini or Dylan. Social networks are not vehicles for self-enlightenment. And “likes” and retweets are not going to elevate political discourse.