This isn't standard fare for curated social media channels - blog entries, white papers, promos for professional services - but if you have the time, this is worth digging into.
This academic paper is a comprehensive literature survey of what various scientific research communities mean by "collective intelligence".
From the Introduction:
"Approaches to studying collective intelligence have been diverse, from the purely theoretical and conceptual to simulations, case studies, experiments and systems design. The field is also multidisciplinary as it is related to, at least, psychology, complexity sciences, cognitive studies, biology, computer sciences and semantics and social media.
"At the moment, there is no theory capable of explaining how collective intelligence actually works. Despite some efforts, generally accepted frameworks for studying collective intelligence in humans do not exist either, and as a result, the field might be at risk of fragmentation. Although a certain amount of diversity is probably good for the advancement of a scientific field, a lack of overarching structure could make the field appear confusing and make it challenging to tie the efforts of different disciplines together in a coherent way. Furthermore, due to the lack of a common framework, it is not possible to assess what is already known. It is challenging for researchers from different disciplines to be aware of advancements in other fields, possibly under differently named concepts."