The second stage of political upheaval in the Middle East can be dated with precision. In 1940, the government of France surrendered to Nazi Germany. A new collaborationist government was formed and established in a watering place called Vichy, and General Charles de Gaulle moved to London and set up a Free French committee. The French empire was beyond the reach of the Germans at that point, and the governors of the French colonies and dependencies were free to decide: they could stay with Vichy or rally to de Gaulle. Vichy was the choice of most of them, and in particular the rulers of the French-mandated territory of Syria-Lebanon, in the heart of the Arab East. This meant that Syria-Lebanon was wide open to the Nazis, who moved in and made it the main base of their propaganda and activity in the Arab world.
It was at that time that the ideological foundations of what later became the Baath Party were laid, with the adaptation of Nazi ideas and methods to the Middle Eastern situation. The nascent party's ideology emphasized pan-Arabism, nationalism, and a form of socialism. The party was not officially founded until April 1947, but memoirs of the time and other sources show that the Nazi interlude is where it began. From Syria, the Germans and the proto-Baathists also set up a pro-Nazi regime in Iraq, led by the famous, and notorious, Rashid Ali al-Gailani.
The Rashid Ali regime in Iraq was overthrown by the British after a brief military campaign in May-June 1941. Rashid Ali went to Berlin, where he spent the rest of the war as Hitler's guest with his friend the mufti of Jerusalem, Haj Amin al-Husseini. British and Free French forces then moved into Syria, transferring it to Gaullist control. In the years that followed the end of World War II, the British and the French departed, and after a brief interval the Soviets moved in.
The leaders of the Baath Party easily switched from the Nazi model to the communist model, needing only minor adjustments. This was a party not in the Western sense of an organization built to win elections and votes. It was a party in the Nazi and Communist sense, part of the government apparatus particularly concerned with indoctrination, surveillance, and repression. The Baath Party in Syria and the separate Baath Party in Iraq continued to function along these lines.
Since 1940 and again after the arrival of the Soviets, the Middle East has basically imported European models of rule: fascist, Nazi, and communist. But to speak of dictatorship as being the immemorial way of doing things in that part of the world is simply untrue. It shows ignorance of the Arab past, contempt for the Arab present, and unconcern for the Arab future. The type of regime that was maintained by Saddam Hussein--and that continues to be maintained by some other rulers in the Muslim world--is modern, indeed recent, and very alien to the foundations of Islamic civilization. There are older rules and traditions on which the peoples of the Middle East can build.
Just go and read all of it for a several hundred year perspective on Middle Eastern Islamic society.