150 is a research project turned social network. By observing what is most natural for our brains within a social networking context, we’re now entering the consumer marketplace. 150 caps all users at 150 friends (Dunbar’s Number) and auto connects to at most 22,500 friends of friends, giving the average person far more effective reach than on social media while also limiting their greater exposure for privacy/security. Resilient to information warfare, the optimal design for mental health, and a generator of community trust, 150 is the next generation social tool.