Primordialism is the idea that nations or ethnic identities are fixed, natural, and ancient. Primordialists argue that each individual has a single inborn ethnic identity independent of historical processes. While implicit primordialist assumptions are common in society and much academic research, primordialism is widely rejected by scholars of nationalism and ethnicity, as individuals can have multiple ethnic identities which are changeable and socially constructed. Primordialism, in relation to ethnicity, argues that "ethnic groups and nationalities exist because there are traditions of belief and action towards primordial objects such as biological factors and especially territorial location". This argument relies on a concept of kinship, where members of an ethnic group feel they share characteristics, origins or sometimes even a blood relationship. Seen through the Igbos of Nigeria, following what they felt was their origin as descendants of the Jews. The term primordialism is associated with sociologist Edward Shils and anthropologist Clifford Geertz. Shils was the first one who used this term in 1957 to describe the bonds between family members. The relations between family members cannot be interpreted as any interpersonal relations, but have a quality of their own which can only be described as "primordial" and which derives from the bond of blood. The meaning of the term was later expanded by Clifford Geertz, according to whom relations of individuals to a community result from their birth into that community, as they inevitably acquire the community's language and social practices. According to Geertz, individuals' ties to certain groups are "natural" and do not result from social interaction. Furthermore, such spiritual bonds exist in all societies and accompany all individuals, although the strength of the primordial connections may vary at the individual level, from society to society, or across time. However, political scientist John Coakley does not name Shils or Geertz as the first theorists or adopters of the concept of primordialism, although he discusses their works.