political theory question: political party theorists
A question for my brothers and sisters in political theory: There are certain individuals who embody the role of the activist/intellectual. They are highly influential in movement politics and they write or speak about movements in a very theoretical way, offering justification for the movement’s goals and strategies. For socialist politics, this role is filled by Lenin, who provided an explanation of what the communist party is supposed to do. For non-violence, King and Gandhi fill this role.
My question: Is there an analog for mass political parties in democratic societies? In other words, who is the master politician who articulates the purpose and function of the party in modern democracies? Does this person talk about how the party should manage/exploit various constituencies, especially rowdy ones like protest movements?