Psychological Safety is important because it is what allows human beings to combine themselves to create a system that can think and operate as ONE THING, a unit that is capable of greater intelligence and creativity than any individual could be alone. Furthermore, being part of a group like this gives us the profound experience of belonging to, of being part of, something larger than ourselves. This makes going to work and being at work intrinsically meaningful and rewarding. If we're going to spend the majority of our waking hours at work, with these people, we may as well have a good time doing it.