Hundredth Monkey Group

The hundredth monkey effect is a hypothetical phenomenon in which a new behaviour or idea is said to spread rapidly by unexplained means from one group to all related groups once a critical number of members of one group exhibit the new behaviour or acknowledge the new idea.

Well, collective unconscious aside, the research that this myth was based on is also an example of the way that simple innovations can lead to extensive cultural change.

By using the water in connection with their food, the Koshima monkeys began to exploit the sea as a resource in their environment. Sweet potato washing led to wheat washing, and then to bathing behavior and swimming, and the utilization of sea plants and animals for food. "Therefore, provisioned monkeys suffered changes in their attitude and value system and were given foundations on which pre-cultural phenomena developed." (M Kawai, Primates, Vol 6, #1, 1965).
 

"What does this say about morphogenetic fields, and the collective unconscious? Not very much, but the "ideological breakthrough" idea is not what Sheldrake’s theory of morphogenetic fields would predict anyway. That theory would recognize that the behavior of the older monkeys (not washing) also is a well-established pattern. There may well be a "critical mass" required to shift a new behavior from being a fragile personal idiosyncrasy to being a well-established alternative, but creating a new alternative does not automatically displace older alternatives. It just provides more choices. It is possible that the washing alternative established by the monkeys on Koshima Island did create a morphogenetic field that made it easier for monkeys on other islands to "discover" the same technique, but the actual research neither supports nor denies that idea. It remains for other cultural experiments and experiences to illuminate this question."

The Hundredth Monkey Revisited
By Elaine Myers, Copyright (c)1985, 1997 by Context Institute

What the research suggests is that having a positive idea is an important step,  but isn't good enough on its own to change the world.
We still need to communicate with each other, we need to translate our ideas into action, and we need to recognize the freedom of choice of those who choose alternatives different from our own.