Jordan's King Abdullah II told EU lawmakers on Wednesday that allowing instability to continue in the Middle East could lead to "untold chaos".
Speaking during a plenary session of the European Parliament in Strasbourg, Abdullah said a war in the region would have serious economic consequences and could also cause a resurgence of terrorism.
Follow Israel Hayom on Facebook and Twitter
Referring to tensions between the United States and Iran, he asked: "What if, next time, neither side steps away from the brink, dragging us all towards untold chaos?"
On January 3, a US drone strike in Iraq killed prominent Iranian commander Qassem Soleimani, responsible for building up Iran's network of regional proxy armies in Iraq and beyond, and Tehran responded with missile strikes on US targets in Iraq, which had no casualties.
Abdullah also said that if Israel succeeds in imposing "an unthinkable solution" by annexing parts of Judea and Samaria, hopes for a two-state solution and a Palestinian state would quickly come to an end.
He added that Israel's construction of Jewish communities in Palestinian territory and "disregard of international law" could be summed up as "one state turning its back on its neighborhood, perpetuating divisions among peoples and faiths worldwide."
The king also touched on the growing crisis in Libya, urging the European Parliament to facilitate a peaceful resolution with the aim of avoiding "all-out war."
Libya, mired in turmoil since the toppling of strongman Muammar Gaddafi, has had two rival governments since 2014.
Led by commander Khalifa Haftar, the eastern-based Libyan National Army has received backing from the United Arab Emirates, Jordan, Egypt, and from Russian military contractors. Turkey backs the internationally recognized Government of National Accord and voted this month to allow a troop deployment to Libya.
On Sunday, Germany will host a summit on Libya involving the rival camps, their main foreign backers and representatives from the United Nations, the United States, Russia, Britain, France, China, Turkey and Italy.