Final answer:
Non-kin groups within a tribe are typically based on shared cultural practices or mutual needs. Clans join to form tribes under a common leader for resource management and other collective actions. While kinship plays a major role, tribe membership involves multifaceted criteria, including cultural connections.
Step-by-step explanation:
Non-kin groups within a tribe are generally based on factors beyond direct family relationships, such as shared cultural practices or alliance necessities. For example, in traditional societies, clans might join together forming a tribe with a common leader to better manage resources, protect their members, or engage in united actions. On the other hand, groups such as village democracies or acephalous societies rely on a variety of social groups for consensus building and decision-making without a centralized authority.
In many indigenous and tribal societies, kinship and extended family structures play a crucial role in social organization; however, membership in a non-kin group usually involves a broader set of criteria, such as shared economic activities, common defense strategies, or adherence to group norms defined by the tribe as a whole. As such, these organizations are not exclusively kin-based but are multidimensional, involving cultural affinity and mutual interests.