Read the mission statements of most major social networks, and amid the lofty rhetoric you will often find the words “creativity” and “connecting people”. But given a marketplace in which Facebook boasts 2 billion users, Instagram is crowded with “influencer marketing” and Twitter has become a byword for hate speech, is there still space for hopeful young people to make meaningful, creative connections? A few years ago, the actor Maisie Williams was one such hopeful. At 13, she was attending a West Country dance school with far-fetched dreams of being a professional actor. Now, at 21, she is an international TV star, a budding screenwriter and, as of next month, a tech entrepreneur. On 1 August she will launch Daisie, a new social networking app for young artists. “We wanted to give people the opportunity to be creative,” she says above the bustle of a London cafe, “without waiting around for someone, somewhere to validate their talent.” Comparisons with her on-screen persona are tempting: the role in Game of Thrones for which she is famous, Arya Stark, is a woman of many parts, changing over successive seasons from a sheltered ingenue to a shape-shifting assassin. But where Arya is a…