here. This is the punchline:
The presence of a [single] supporting partner depleted the majority of much of its power. Its pressure on the dissenting individual was reduced to one fourth: that is, subjects answered incorrectly only one fourth as often as under the pressure of a unanimous majority.
Isn't that a great example of the power of setting an example. Of how change happens one person at a time. Of courage. Of how important it is that people feel safe. People are always more impressed by the power of our example than by the example of our power.