What is the obligation of one who lives in a society that does not apply the Shari'ah?

This message came from Sudan from a person who symbolized his name with (M. A. H.). He says: I live in a society that does not apply the Islamic Shari'ah in all aspects, and I am unable to make them apply it. Is there anything required of me in this matter or not?
Answer: If it is possible for one who lives in a country that does not apply the Shari'ah... if he is able to migrate to a country that applies the Shari'ah, it is obligatory for him to migrate if he can do so. If he cannot, there is no blame on him for remaining, and he should fear Allah as much as he can, guide to what is good, advise the people, and call to the implementation of the Shari'ah according to his capacity. In this case, he is rewarded. If he has the ability to enforce what is right and prevent what is wrong because he is a chief, a tribal shaykh, or a village emir, he can do these things. If Allah knows his sincerity, He will help him. So he does what he can of implementing the Shari'ah according to his capacity. As a tribal shaykh, he rules by the Shari'ah among them if he knows, if he has information. As a village emir, he can rule by the Shari'ah among them in what they dispute over and the like. The point is that he strives and fears Allah as much as he can. Allah does not burden a soul beyond its capacity. He calls upon Allah for the rulers to be guided, that Allah will guide them and make them successful, or bring someone else who rules by the Shari'ah, like that. As for if it is decreed that he migrates and moves to a country that rules by the Shari'ah, this is obligatory upon him, except if he is a scholar with information, insight, and guidance, and he sees that his remaining in this country involves calling to Allah, directing people to what is good, guiding them to the oneness of Allah, and saving them and taking them out of darkness into light. He has a reward for that for the sake of the call, for the sake of directing to what is good, for the sake of saving people from what they are in of falsehood. So he is in great good, and migration is not obligatory upon him in this case; because he displays his religion and because he has information in his religion such that he does not fear for himself from their doubts, so there is no harm. Yes.