The document discusses the development of social networking sites and their increasing importance and influence in society. It notes that social networks are replacing other communication platforms and online communities are becoming more stratified. As social networks become more mobile-accessible, their user base is decreasing in age. The document argues this model can help develop early warning strategies for issues like cyberbullying through cooperation between stakeholders. It also suggests social networks could form the basis of a "digital social contract" through principles and policies to prevent problems while promoting inclusion.