Clash of cultures, religious tribes, brands create tribes, every corporation is many tribes. Tribal inequality of wealth risks global instability, protest movements and new terrorist groups. Tribes give music, language, poetry, literature, teams, friends, neighbourhood, family, teams, communities and nations. Most businesses are tribes of tribes. Niche markets and tribalism. Tribal leadership – leading thousands of people, motivation, inspired workers, higher productivity, people movements. Clients and customer segmentation. Political tribes, campaigns and protest groups, activists.