Seth has written 20 best-selling books including This is Marketing, which was an instant bestseller in countries around the world. Creatives everywhere have made his latest book, The Practice a bestseller. Each day he publishes the most well read blog on the internet.

His newest interest: the tribes we lead, argues the Internet has ended mass marketing and revived a human social unit from the distant past: tribes. Founded on shared ideas and values, tribes give ordinary people the power to lead and make big change. He urges us to do so too.