FILE - in this Sept. 13, 2017 file photo activists of the International Campaign to Abolish Nuclear Weapons (ICAN) protest against the conflict between North Korea and the USA with masks of the North Korean ruler Kim Jong Un, right, and the US president Donald Trump, left,  in front of the US embassy in Berlin, Germany. The International Campaign to Abolish Nuclear Weapons wins the Nobel Peace Prize. The Norwegian Nobel Committee honored the Geneva-based group "for its work to draw attention to the catastrophic humanitarian consequences of any use of nuclear weapons and for its ground-breaking efforts to achieve a treaty-based prohibition of such weapons." (Britta Pedersen/dpa via AP)
FILE - in this Sept. 13, 2017 file photo activists of the International Campaign to Abolish Nuclear Weapons (ICAN) protest against the conflict between North Korea and the USA with masks of the North Korean ruler Kim Jong Un, right, and the US president Donald Trump, left, in front of the US embassy in Berlin, Germany. The International Campaign to Abolish Nuclear Weapons wins the Nobel Peace Prize. The Norwegian Nobel Committee honored the Geneva-based group "for its work to draw attention to the catastrophic humanitarian consequences of any use of nuclear weapons and for its ground-breaking efforts to achieve a treaty-based prohibition of such weapons." (Britta Pedersen/dpa via AP) Credit: Britta Pedersen

OSLO, Norway — The International Campaign to Abolish Nuclear Weapons won the Nobel Peace Prize on Friday, a forceful show of support for a grassroots effort that seeks to pressure the world’s nuclear powers to give up the weapons that could destroy the planet.

The choice of the little-known coalition of disarmament activists put the Nobel committee again at the forefront of geopolitics at a time when fears are rising over North Korea’s nuclear and missile program and the invective it has drawn from U.S. President Donald Trump.

The committee cited the tiny, Geneva-based ICAN for its work that led to the Treaty on the Prohibition of Nuclear Weapons that was reached in July at the United Nations.

The group “has been a driving force in prevailing upon the world’s nations to pledge to cooperate … in efforts to stigmatize, prohibit and eliminate nuclear weapons,” Norwegian Nobel Committee chairwoman Berit Reiss-Andersen said in the announcement.

More than 120 countries approved the treaty over opposition from nuclear-armed countries and their allies. In a statement issued after the Nobel was announced, the U.S. reiterated its position that the treaty “will not result in the elimination of a single nuclear weapon.”

The treaty requires all ratifying countries “never under any circumstances to develop, test, produce, manufacture, otherwise acquire, possess or stockpile nuclear weapons or other nuclear explosive devices.” It also bans any transfer or use of nuclear weapons or nuclear explosive devices — and the threat to use such weapons.

The nuclear powers oppose the treaty, which goes well beyond existing nonproliferation agreements, arguing that they alone should have the weapons in order to support stability in the world.

The U.S., Britain and France said the prohibition wouldn’t work and would end up disarming their nations while emboldening what U.S. Ambassador Nikki Haley called “bad actors.” They instead suggest strengthening the nonproliferation treaty, which they say has made a significant dent in atomic arsenals.

ICAN, a coalition of 468 nongovernmental groups from over 100 countries, says that argument is outdated.

“This prize is really a tribute to the tireless efforts of many millions of campaigners and concerned citizens worldwide who have, ever since the dawn of the Atomic Age, loudly protested nuclear weapons, insisting that they can serve no legitimate purpose and must be forever banished from the face of our Earth,” said ICAN executive director Beatrice Fihn.

The prize is likely to give new momentum to ICAN and its allies in the coming months as the group tries to achieve ratification of the treaty by 50 nations. That would allow the ban to become binding under international law for those countries and put nuclear-armed states in the uncomfortable position of being outliers.

On Sept. 20, the first day the treaty was open for signatures, 51 countries signed it and three submitted their ratifications. ICAN hopes to get the 50 ratifications by the end of 2018.

Norwegian Nobel Committee chairwoman Berit Reiss-Andersen noted that international prohibitions have been set on chemical and biological weapons, land mines and cluster munitions.

“Nuclear weapons are even more destructive, but have not yet been made the object of a similar international legal prohibition,” she said.

The five original nuclear powers — the U.S., Russia, China, Britain and France, which also are permanent members of the U.N. Security Council — support nuclear nonproliferation but boycotted the treaty negotiations. Nuclear-armed India, Pakistan and North Korea didn’t vote.

“If you want to make sure that no new states get nuclear weapons, you need to be ready to reject nuclear weapons themselves,” Fihn said. “This treaty really demands that they walk the walk.”

ICAN has its roots in Australia but was launched in Vienna in 2007, inspired by another Nobel peace prize-winning group, the International Campaign to Ban Landmines.