The 1972, 1979, and 1987 missile reduction agreements between the united states and the soviet union are examples of the foreign policy of

The 1972, 1979, and 1987 missile reduction agreements between the United States and the Soviet Union are examples of the foreign policy of "detente," since these were agreements meant to benefit both nations, and indeed the world. 

the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.