Answer:
both self-interest and national interest.
Explanation:
Politics is defined as the activities or sum total of processes involved or associated with the governance of an area, country or state. Drawing from the above definition, it is easy to see why the self interest/welfare of a person and also that of the nation /national interest are key and primary purposes for the study of politics. Modern political philosophies such as is reflected in Democracy demonstrate the need for every individual's and the interest of the nation as a whole.
