Primarily a Scottish surname and place name, referring to several locations in Scotland. Most notably associated with Dunbar's number, the cognitive limit of stable social relationships humans can maintain.
From Scottish Gaelic 'Dùn Bàrr,' meaning 'fort on the summit' or 'hill fort.' The name reflects the strategic importance of elevated defensive positions in medieval Scotland.
Dunbar's number (around 150 people) suggests that human brains evolved to handle the social complexity of small tribes, which explains why large organizations need hierarchies and why social media can feel overwhelming. This cognitive limit has profound implications for everything from military unit sizes to the structure of successful companies.
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