Social Structures play the role of umbrella in a society which helps the society to function socially. It is comprised of various institutions, ideologies and social entities functioning in a social system. For instance, democracy (governance), religion (beliefs), military (security), judiciary (justice) and media (accountability) are the institutions of that social structure in which society functions and integrates the social process.
Social Systems on the other hand are the operational manuals for maintaining the social structure. Social systems have ‘norms, rules, laws and goals’ to execute within its jurisdiction so that the social system may achieve the ultimate objectives for the functioning of society.
But sometimes it is the individuals which influence both on social process and social structures and we have the example of those charismatic leaders such as Gandhee with his non violence movement, Dr. King with his civil rights movement and Nelsen Mandela for the liberation of apartheid Africa. On the other hand one finds the leaders who disrupted the social structure and social process with their leadership such as Hitler and Taliban.