In this presentation I revisit some of my work on 'groups and networks' to draw out the distinction between cooperation and collaboration for this mass collaboration workshop. I argue that mass collaboration may be impossible to achieve, and show how we employed a principle of mass cooperation to support massive open online courses (MOOCs). I also introduced new terminology, using the term 'collective' to describe what I have been calling 'groups', and 'connectives' to describe what I have been calling networks. For audio please see http://www.downes.ca/presentation/340
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