The essay has a few passages about things related to The social skill of Politeness, in a broader sense, The very Skill of Enchanting people. This is the skill

The essay has a few passages about things related to The social skill of Politeness, in a broader sense, The very Skill of Enchanting people. This is the skill ultimately responsible for making money, in my experience, no matter what other skills people will praise. I didn't find the specific mention of the 97%, as it was a long essay, but I will consider that what you mean with nonverbal must be related with the human social interaction.