forerunner

US /ˈfɔːrˌrʌn.ɚ/
UK /ˈfɔːrˌrʌn.ɚ/
1.

tiền nhân

something or someone that acts as an early and less advanced model for what will appear in the future, or a warning or sign of what is to follow:

:
Germany's Green party was said to be the forerunner of environmental parties throughout Europe.