It has the force of international law even though the treaty is not binding for countries that decline to join. The treaty, negotiated at the United Nations in 2017, took effect early this year, three months after the 50th ratification. The International Campaign to Abolish Nuclear Weapons, the Geneva-based group that was awarded the 2017 Nobel Peace Prize for its work to achieve the treaty, said in a report released on Thursday that it had seen increased backing for the accord among voters and lawmakers in NATO’s 30 countries, as reflected in public opinion polls, parliamentary resolutions, political party declarations and statements from past leaders. As President Biden and his NATO counterparts focus on nuclear-armed Russia at their summit meeting on Monday, they may also face a different sort of challenge: growing support, or at least openness, within their own constituencies for the global treaty that bans nuclear weapons.
