Paper: Understanding collective content: Purposes, Characteristics and Collaborative Practices

I feel the paper is very relevant to the idea that successful social interaction is centered around 'objects' (e.g pictures or interests) which can be shared by everybody. To quote from section 5.3 "Collective content was observed to have a significant role in
facilitating communication and social interaction in the studied
communities. It was an ice-breaker of discussion in the less active
communities, and a catalyst and evoker of social interaction and
nurturer of the sense of community in the active communities."

2009 Paper by Thomas Olsson "Understanding collective content"

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