Describe the distinct differences between lineages, clans, moieties, and phratries are all types of decent groups.

Lineage is a descent group that can demonstrate their common descent from a known apical ancestor.
Clan is a descent group that claims common descent from an apical ancestor (but often cannot demonstrate it, or "stipulated descent").
Moieties is a descent group that coexists with only one other descent group within a society
Phratries is a descent group composed of two or more clans each of whose apical ancestors are descended

If marriage is a universal concept, why is it practiced so diversely?

Two people living together and forming a household is the essence of marriage.

To understand the distinct differences between lineages, clans, moieties, and phratries, let's break down each term:

1. Lineages:
Lineages are descent groups that can demonstrate their common descent from a known apical ancestor. They trace their ancestry back to a specific individual and maintain a clear genealogical record of their lineage. Lineages often have specific rights, privileges, responsibilities, and obligations associated with their membership.

To identify lineages, one can typically study genealogical records, oral histories, or other documentation that establishes a direct line of descent from the apical ancestor. These records can provide evidence of shared ancestry and help differentiate lineages from other forms of descent groups.

2. Clans:
Clans are descent groups that claim common descent from an apical ancestor, but they might not be able to demonstrate it through verifiable evidence (also known as "stipulated descent"). Unlike lineages, clans may have less precise records or may rely more on oral traditions and shared beliefs.

Distinguishing clans from lineages may require studying the cultural, social, and historical context in which they exist. Clan membership is based on collective identity, shared beliefs, and a sense of kinship. It is important to recognize that while clans claim common descent, they might not be able to provide specific evidence to support this claim.

3. Moieties:
Moieties refer to a specific kind of descent group that coexists within a society with only one other descent group. In other words, a society is divided into two distinct moieties. These divisions are often significant and shape social, political, and ceremonial activities.

Identifying moieties in a society requires an understanding of the social structure and organization. Relationships between the two moieties can be collaborative, cooperative, competitive, or in some cases, involve certain rituals or ceremonies. Moieties can have shared beliefs, responsibilities, and roles that differentiate them from other descent groups.

4. Phratries:
Phratries are descent groups composed of two or more clans, each of which claims descent from a different apical ancestor. Phratries are characterized by the recognition and cooperation between multiple clans, typically with shared cultural practices, ceremonies, and rituals.

To differentiate phratries from other descent groups, it is crucial to examine the relationships and interactions between clans. The unity and cooperation between the clans within a phratry create a distinct group identity that is separate from other descent groups.

In summary, the key differences between lineages, clans, moieties, and phratries lie in the ability to demonstrate common descent, the recognition of descent claims, the number of coexisting groups, and the nature of relationships between these groups within a society. Understanding the cultural, historical, and social contexts of these descent groups is crucial to distinguishing one from another.