Jane Newton, Lincoln County Extension Agent - Family and Consumer Sciences Two, four, six, twelve, one-hundred-fifty, or two thousand people. Which is the most important size group for you? According to Robin Dunbar in his book Grooming, Gossip and the Evolution of Language each size has special importance. Dunbar, a psychologist and researcher who teaches at Liverpool College in England, cites many research studies to support his assertions that each size group has special functions. 7 2 2021 Friday, July 2, 2021 13:17:41 PM PDT Extension Homemakers Blog afranke@uada.edu