The Security Council unanimously adopted UN Resolution 465 in March, 1980 that addressed Israel's illegal occupation of the Palestinian territories of the West Bank, Gaza, East Jerusalem and the Syrian Golan Heights. Among other provisions in it, it condemned Israel's policy of "setting parts of its population and new Immigrants in those territories (and said doing so constituted) a flagrant violation of the fourth Geneva Convention relative to the protection of civilian persons in time of war and also constitute a serious obstruction to achieving a comprehensive, just and lasting peace in the Middle East." It called on the government of Israel to "dismantle the existing settlements and in particular to cease....the establishment, construction and planning of (new) settlements in the Arab territories since 1967, including Jerusalem."
In the last 26 years, Israel has flagrantly violated this resolution and still continues to build new settlements illegally in the Palestinian Occupied Territories. The US supports and funds the Israeli government enabling it to do it, and the UN and world community have taken no action to bring Israel into compliance which it could do by imposing sanctions severe enough to force Israel to stop new settlement construction, dismantle the existing ones and make restitution to the Palestinians and Syrians for the harm caused them.
The Security Council also passed Resolution 476 in June, 1980. Like Resolution 465, it, too, reaffirms the necessity to end the Israeli occupation of Arab territories ongoing since the 1967 war. It went on to condemn Israel for its continued refusal to do it or to comply with the relevant Security Council and General Assembly resolutions demanding it does. It repeated provisions detailed in Resolution 465 and reaffirmed its determination in the event of Israeli non-compliance to examine practical ways to get it to do so. Israel never complied, and the UN never took action to see that it did. Also, by its reinvasion of Lebanon now and its unending occupation of the Shebaa Farms area it's held since 1967, Israel is also in violation of UN resolution 425 and nine additional ones demanding the withdrawal of its forces from South Lebanon. The net effect of UN action - many relevant and high-sounding words and speeches amounting to nothing, at least when it concerns Israel.