Noam Cohen is a journalist and the author of “The Know-It-Alls: The Rise of Silicon Valley as a Political Powerhouse and Social Wrecking Ball.” From 2007 to 2013, he wrote the New York Times’ “Link By Link” column, which covered the influence of digital technologies on global culture and the economy, including some of the Timesโ earliest coverage of Wikipedia, Bitcoin, and Twitter. Since then, Cohenโs op-eds in the Times have exposed the ties between Silicon Valleyโs disruptive values and Donald Trumpโs candidacy and election.