fundamentalism

US /ˌfʌn.dəˈmen.t̬əl.ɪ.zəm/
UK /ˌfʌn.dəˈmen.t̬əl.ɪ.zəm/
1.

chủ nghĩa chính thống

the belief in old and traditional forms of religion, or the belief that what is written in a holy book, such as the Christian Bible, is completely true:

:
Recent years have witnessed a growth in religious fundamentalism.