pan-Indianism
/ˌpanˈɪndɪənɪz(ə)m/noun
1A policy, theory, or movement uniting all the peoples or languages of India, or examples of Indian culture worldwide; Indian nationalism.
2The identification of many or all of the Indian peoples of the Americas with a collective culture or system of religious beliefs.
Origin
Early 20th century; earliest use found in American Anthropologist. From pan-Indian + -ism.