International law began as a system governing the relations among sovereign states and states have always been the primary legal entities affected by international law. As the global system has become more complex, however, international law has come to recognize and regulate international organizations, businesses, nonprofit entities, and individuals.
What is the legal status of international law whether international law is 'law' in the true sense or not. The question is still under hot debate among jurists. Regarding the nature of international law, some writers, like Zimmer and Willoughby are ambiguous as to whether it is a law or not. Since international law appears to control or even affect states in their actual search of 'very important national interest',
Legislature of different countries has different roles in influencing and formulation their foreign policy. In the Autocratic system, the legislature are less influential where as in democratic system like those in United States and United Kingdom their Indirect influence is significant. In democratic countries legislatures exert their influence by rejecting funds allocated by the government for defence or as aid to foreign countries.
Foreign policy is sum total of foreign action for achieving objectives, foreign commitments and the correct form of its interest. Aims and Objective for foreign policy are national interest, economic development, Protection of Territorial Integrity, Maintenance of links with other Members and Enhancement of the influence of the State
In the modern times, no state can survive in isolation and no state can ignore the involvement in international sphere. This involvement must be systematic and based on some well-defined principles. So, such kind of principles in the light of that such involvements are made is called Foreign Policy.
Nation state system is as old as the human history. It will be more correct to say that the history of nation state system starts with the political consciousness of man. In this modern age, no one can satisfy its all needs alone and due to this lie has to make relations with other states in order to satisfy his desires, interests and goals. In the field of international politics these states are called sovereign states or nation state system.
When the concerned States fail in settling a dispute by peaceful means, forcible or coercive means are adopted. These are Retorsion, then Reprisal, Intervention, Blockade war.According to J.G.Starke, retorsion is relation by a state against Retorsion discourteous or inequitable acts of another state such retaliation.
Before opting coercive means of dispute settlement, States try following methods of international dispute settlement by amicable means. According to Oppenheim, "Negotiation is an intercourse between two or more states as is initiated and directed for the purpose of effecting and understanding between them or settling a dispute.