culture can be defined as a shared system of values and beliefs and it contributes the society with an identity for specifics members of a group. culture shapes the way how a group of people behaves and react to situations. now, there are some factors that to build a culture, among those, it is people.
people influence culture in the way they behave, it means that people influence culture with its own and particular patterns of values, beliefs, and shared behavior of a social group. and the reason for this is that something becomes culture when it’s common among a large group of people in the way that is easily spread to the whole society and if that large group of people decides to change something, they start behaving in a different way so that, the rest of the people change and culture is being influenced.
an easy example would be this:
it is noticeable how some people don’t care and throw the trash to the floor, and it is not a secret that a group of people does that. if a larger group of people want to change it, they start behaving differently around the minor group so that; they learn and acquire a different way to do things.