When president nixon took office he announced that an era of confrontation in foreign policy would be replaced by

"And now to the leaders of the Communist world, we say: After an era of confrontation, the time has come for an era of negotiation. Where the world's super powers are concerned, there is no acceptable alternative to peaceful negotiation. Because this will be a period of negotiation, we shall restore the strength of America so that we shall always negotiate from strength and never from weakness."

ask google there you might be able to find an answer for the question you're trying to ask

a countries leader should be motivated by the common good of the country.