sentences:  Henry Kissinger has been credited with formally introducing the policy of "Realpolitik" to the White House as Secretary of State to Richard Nixon.In that context, the policy meant dealing with other powerful nations in a practical manner, rather than on the basis of political doctrine or ethics such as Nixon's diplomacy with the People's Republic of China despite American opposition to communism and the previous doctrine of containment.Another example is Kissinger's use of shuttle diplomacy after the 1973 Arab-Israeli war, when he persuaded the Israelis to withdraw partially from the Sinai in deference to the political realities created by the oil crisis.