Summary

Robin Dunbar's research reveals inherent neurological limits to human social relationships, demonstrating specific numerical thresholds for social group effectiveness. His work identifies key relationship layers: five in a core group, 15 with deep trust, 50 for meaningful work connections, and 150 for stable social networks. Military and mathematical empirical research has confirmed these cognitive boundaries, suggesting that human social interactions have predictable structural constraints. Understanding these natural relationship limits can help individuals and organizations optimize communication and collaboration strategies.