The key phrase here is "general-interest" cohesion of the group is harder to achieve when the range of topics is very wide. Most of the sites that maintain a g

The key phrase here is "general-interest" cohesion of the group is harder to achieve when the range of topics is very wide. Most of the sites that maintain a good discourse revolve around specific subjects, often to a specialized degree. HN is a group that discusses technology and its implications, this framework gives the group a cohesive context. The scale is different.