Comment: Arab soldiers don't know what they are fighting for, which has led to a disastrous rout on the battlefields of Yemen and Iraq, says Adel Soliman.
Comment: The lumbering militaries of the Arab world are not suited to fighting irregular wars with nebulous enemies. We need something else, says Adel Soliman.
Comment: Dreams of political hegemony under Zaydi leadership, revived by the Houthis, have collided with regional geopolitics.
Comment: No longer are Arabs fighting Israel, instead they are killing each other.
In 1916, Hussein bin Ali began a futile quest to destroy the Ottomans and create an Arab caliphate. Nearly a century on and the "Islamic State" exists. It is not what anyone dreamed of.
In modern history, three events have marked Egypt's transition to the revolutionary age, and the vigour that gripped the country during the overthrow of Hosni Mubarak endures.