the Soviet Union (later Russia) within the UN have evolved in step with the larger geopolitical situation between the two powers. While the Soviet Union was boycotting the Security Council and China's seat was represented by U.S.-friendly Republic of China (instead of the communist People's Republic of China which would replace the ROC in the UN in 1971), the U.S. and UN jointly condemned the invasion of South Korea by North Korean troops, leading to the UN sanctioned Korean War. Later, the U.S. persuaded all permanent members of the Security Council to authorize force against Iraq after it invaded Kuwait in 1991. This was a major step toward U.S. and Russian reconciliation after the end of the Cold War. Sources of conflict Since 1991, the United States has been the world's dominant military, economic, social, and political power (not to mention hosting the UN Headquarters itself in New York City); the United Nations was not designed for such a unipolar world with a single superpower, and conflicts between an ascendant U.S. and other UN members have increased. Conflict between the U.S. and the UN predates the collapse of the Soviet Union. In 1971, the UN adopted Resolution 2758—which affected the admission of the People's Republic of China and the removal of the Republic of China—despite objections by the U.S. government (see China and the United Nations). The U.S. government changed its own China policy shortly afterward, however, so the conflict between the UN and US foreign policy was short-lived. The U.S. government's repeated opposition to Arab military actions has created much more tension between the U.S. government and the United Nations. The General Assembly Resolution 3379 (determining that Zionism is a form of racism and racial discrimination) of 1975 was strongly opposed by U.S. officials. In 1991, the General Assembly adopted Resolution 4686, which effectively negated Resolution 3379. Use of its veto power to prevent the Security Council from issuing resolutions condemning Israeli military action has frequently divided the U.S. from the Soviet Union, China and France in the Security Council; since 1989, the U.S. government has dissented against Security Council resolutions on 12 occasions out of 17 total instances when a permanent member vetoed. Of these 12 occasions, only two related to issues other than the Israeli–Palestinian conflict. In 2009, the U.S. government abstained from Security Council Resolution 1860, which called for a halt to Israel's military response to