What is defined as a system that members of a group share beliefs and values?

The concept described in the question refers to a system in which members of a group share beliefs and values, which aligns closely with the definition of culture. Culture encompasses the shared practices, norms, values, and beliefs of a group, shaping their identity and social interactions. It is a broader term that includes language, traditions, and customs as well.

While a belief system indeed relates to the values and convictions held by individuals or groups, it is typically more specific to particular ideologies or religions rather than the broader societal framework that is represented by culture. Social hierarchy refers to the organization of society into different levels of power and status, and tradition pertains to long-established customs or practices within a culture, rather than the overarching system of beliefs and values. Therefore, the correct term that encompasses the shared beliefs and values of a group is culture.