On October 29th, Saudi Arabia adopted a series of punitive measures against Lebanon. The kingdom was followed by Bahrain, its very close ally, then by Kuwait and the United Arab Emirates. There is fear that Lebanon, in the midst of economic collapse, will be transformed into a ground of confrontation between Iran and Saudi Arabia. The case rings a very alarming bell for the security and stability of the Mediterranean region. The definition of a clear and strong common European Foreign Policy becomes more and more urgent – writes dr. Giovanni Cascone in his comment “Lebanon. The diplomatic crisis in the heart of Middle East”.