There is a very powerful action that we all take, whether we know it or not. Our behavior sets an example and influences other people, whether we want it to or not.
Most of the time we probably don't even notice it, because in day to day life it can be quite subtle. It is so clear when we see a younger child taking on the behaviors of an older sister or brother.
This is a big part of how cultural identities form. Do you hug, kiss one cheek, kiss both cheeks or shake hands? See what I mean? These things are learned by example as we grow up.
It is what we see around us, and people seem to like it, so it is how we behave.

This is also peer pressure. Most of us are social human beings; we like our groups, and usually want to fit in. This works best when we are with people who have similar purposes to ours, or at least similar values. In these instances, even a people with a vast array of behavior can work together. The behavior will start to align with the achievement of the purpose, which may make necessary some cultural adaptations. But are commonly we think of peer pressure as the excuse we give when our teenager stays out past curfew, or skips school. It is remarkable that no parent wants to think of their child as a ring leader, or bad influence or example. But hey, leadership is a valuable skill. The trick is to use it to set a good example. L. Ron Hubbard states it directly and simply in The Way To Happiness, "There are many people one influences. The influence can be good it can be bad." www.thewaytohappiness.org @waytohappinesstampa