King Abdullah of Jordan has criticised the international community for only offering a piecemeal way of dealing with the crises in the Middle East.
He said an overall strategy was lacking and he feared for the region's future.
In a BBC interview, the king urged key Western nations to listen to the views of Arab countries on Lebanon's future.
An Arab League delegation is set to urge the UN to amend a draft resolution to include an immediate Israeli withdrawal from southern Lebanon.
The draft resolution, aimed at ending the fighting and paving the way for an international peacekeeping force, is still under discussion at the UN.
King Abdullah told the BBC that the Lebanese people and the government of Prime Minister Fouad Siniora were in the best position to articulate what was needed to end the crisis.
That was why Arab nations were backing the Lebanese government's seven-point proposal for ending the fighting, he said.
"The Lebanon that we knew is dead now. The challenge for us is do we have a chance to build a new page for Lebanon, a good one, or is it going to go into a destructive mode and suck the rest of us in."
He spoke of a region that was being radicalised by the growing support for Hezbollah as it fights back against Israel attacks.
The moderates, he said, were being marginalised.
The BBC's Lyse Doucet in Amman, who interviewed the king, say it is clear that countries like Jordan and Egypt, who have close ties to the United States and peace deals with Israel, feel deeply worried, if not threatened, by this crisis.
In his interview, the king said he could not read the political map of the Middle East any more because of what he called the heavy clouds on the horizon.
"Each time we have a crisis it gets far more unstable," he said.
The international community had no overall agenda, King Abdullah said.
"It's a piecemeal way of dealing with situations, whether it's the Israel-Palestinian one, whether it's Lebanon, whether it's Iraq or the issue of Iran, there's no overall strategy."
That was why the Egyptians, Jordanian and Saudis, with a lot of other Arab nations, were trying to get a unified position, he said.