Left-leaning website Wikipedia has taken the drastic action of permanently blocking one of its founders from editing pages — after he had campaigned to make it more balanced and fair. Last month, Larry Sanger launched WikiProject Intellectual Diversity (WID), a group designed to help reinforce the online encyclopedia’s “original, firm commitment to intellectual diversity,” by emphasizing neutrality and transparency. However, Sanger — who coined the name “Wikipedia,” drafted the site’s foundational set of rules and guidelines, and launched the site alongside Jimmy Wales in 2001 — is now indefinitely blocked from editing, the most drastic action the site can take...