This is a response to “Who Controls the Platform?“—a multi-part Quillette series authored by social-media insiders. Submissions related to this series may be directed to pitch@quillette.com. Many conservatives believe that social media companies are biased against their views. This includes Donald Trump, who last year accused Twitter of “shadow banning” Republicans, and promised to “look into this discriminatory and illegal practice.” A few months later, Twitter CEO Jack Dorsey made a categorical denial of any bias while testifying before Congress: Let me be clear about one important and foundational fact: Twitter does not use political ideology to make any decisions, whether related to ranking content on our service or how we enforce our rules. We believe strongly in being impartial, and we strive to enforce our rules impartially. Recently, Mr. Dorsey appeared on two different podcasts, on which he similarly denied any bias against the right. Not everyone is convinced. A June, 2018 Pew poll found that 72% of Americans believe that social media companies censor views they don’t like, with members of the public …