The law of the conservation of trust

Researcher Robin Dunbar says, on average, we can only maintain a trusted social group of one hundred and fifty people. We can change which people, brands, and ideas we trust, but the number stays the same.

We are exposed to an increasing number of brands each year, but with no more trust and attention to hand out. The result is a shift in how companies grow and how marketing works. Warren Buffett shows a change from "push" marketing to "pull" marketing. We are entering a trust shortage. The individuals and brands which are "long trust" will win.