Jan Kubis, a former Slovakian foreign minister, has told Sky News that Lebanon faces a new level of social unrest and chaos without the implementation of reforms to address a deepening economic crisis.
Mr Kubis' previous UN postings were in Iraq and Afghanistan. He knows what failed states look like, and he warned of the dangers of Lebanon becoming another.
"Without reforms, the crisis will turn into a security crisis. Then of course we will have not only those Syrians that are still in droves as refugees [here] but many others, starting with the Lebanese, that simply try to example this kind of social strife."
The country's economy is struggling and more than 200,000 jobs have been lost since the crisis began.
Local estimates say 10% of companies in Lebanon have gone out of business and many employees have had their salaries cut.
Banks have imposed limits on how much people can withdraw from their own accounts - in some cases as little as the equivalent of £150 every fortnight.
Two weeks ago, a new government was appointed in an attempt to meet the protesters' demands.
"Politics is local and if you look at what is sometimes very obvious, the political discussions in a number of countries in Europe is their fear of another wave of migration. And they know very well that Lebanon is not around the globe," he said.
"Lebanon is on the shores of the Mediterranean. Just look at what is happening now. Look at the waves of migration being generated by many other countries. And what is the destination? It's Europe."
Western governments have pledged to help Lebanon but only if it can prove that it is seriously tackling the crisis. Mr Kubis welcomed this.
"Politicians in Europe must understand that the more they will support real reforms in Lebanon, provided Lebanon will go into real reforms, this is better for them because they can maybe stabilise the situation to such an extent that it will give perspective to the younger Lebanese to stay in their own country."
