Rule 3 of 21 · Chapter I — Show Up as Yourself
Behave the same way toward the person who washes the kit as toward the person who owns the club.
Why this rule exists
People read your treatment of the powerless as the truest available evidence of your character, because there is nothing in it for you. If your warmth scales with someone's usefulness, everyone correctly concludes that theirs is conditional too, and the honesty you need from junior people dries up. It also gives you information: the people at the edges of an organisation see things the centre never hears.
In practice
Same greeting, same eye contact, same willingness to be interrupted, regardless of rank. Learn the names of people whose work is invisible — cleaners, drivers, the person who fixes the boiler — and thank them specifically rather than generally. Notice when you are cutting someone off because they are junior, and stop.
When it doesn't apply
Equal respect is not equal time; a leader's attention is finite and rightly goes where the decisions are. And equal treatment does not mean identical candour — some information belongs to specific roles.