When Phil Howard lived in Budapest, he watched as Hungary’s fledgling democracy was polluted with polarizing stories spread online. It’s a phenomenon now threatening political discourse everywhere, and recent tweaks meant to improve social media policies and algorithms, he says, amount to “a drop in the bucket.” But find out why Howard, a professor of internet studies at Oxford University, thinks we need more social media, not less; and how machine learning and big data might be democratized for good.