(NEWSER) – "Dangerous currents" are creating a "darker world," President Obama told the UN General Assembly on Monday, touching on a slew of issues including the "apocalyptic cult" ISIS, the ongoing crisis in Ukraine, and Syria's civil war, NBC News reports.

Obama underscored the need to keep global stability intact, even if it means working with Iran and Russia to bring the Syrian crisis to a halt and oust the "tyrant" Bashar al-Assad—but he warned that Vladimir Putin has to get on board with this plan and also end the continued Russia-Ukraine crisis, the Washington Post reports. "We cannot stand by when the sovereignty and territorial integrity of a nation is flagrantly violated," Obama said, adding, per NBC: "If that happens without consequence in Ukraine, it could happen to any nation represented here today."

Read the full story on Newser.com

PHOTO: Getty Images