Social message of the Hebrew prophets

[What is the meaning of the term "prophet" in the Old Testament literature? The term “prophet" coming from the Hebrew word, “nabi" means essentially a mediator by speech between man and God. He is sometimes given other designations, such as “ man of God,” “servant of Jehovah” and “interpreter.” But the fundamental content, abides through all of these. The prophets were the preachers of their day. They are the beating heart of the Old Testament. They spoke against the oppression and cruel treatment of the poor and advocated righteousness and social justice for all. The prophet is always a man of his own time, and it is always with the conditions of his own day that he is vitally concerned.The things he speaks about are of importance to the people of his own age, wether they be things pertaining to the internal life and conduct of the people or things affecting their external fortunes. And when he speaks, he does so with the intention of influencing his auditors. Oftimes the most powerful means of exerting the desired influence on the minds of hid time is found in what he is able to reveal of the future.