ideologue
//ˈaɪ.di.ə.lɒɡ//
Noun
ideologueSingular
ideologuesPlural
1
A person who rigidly adheres to a particular ideology, especially one who is uncompromising and dogmatic in their beliefs.
The political ideologue refused to consider any compromise on his beliefs.
2
An advocate or proponent of a particular ideology or set of ideas, often with a focus on political or social doctrines.
The political ideologue spent years promoting his vision of social reform.