CEO Mark Zuckerberg is no longer satisfied with just connecting the world so that people can pass around baby pictures and live video — or fake news and hate symbols. [...] the Facebook founder wants to bring more meaning to its nearly 2 billion users by shepherding them into online groups that bring together people with common passions, problems and ambitions. Facebook continues to grapple with the darker side of connecting the world, from terrorist recruitment to videos of murder and suicides to propaganda intended to disrupt elections. For Zuckerberg, using his social network to “build community” and “bring the world closer together” — two phrases from Facebook’s updated mission statement — is a big part of the answer. “When you think of the social structure of the world, we are probably one of the larger institutions that can help empower people to build communities,” Zuckerberg said in a recent interview at the company’s offices in Menlo Park. Facebook is also adding administrative tools intended to simplify the task of screening members and managing communities in hopes that will encourage people to create and cultivate more groups. Facebook groups are ad hoc collections of people united by a single interest; they offer ways to chat and organize events.