This was the closest one yet. However, I still think that Ethiopia was harder, since I had a lot bad luck in this one; like two of my vassals collapsing in the 20th century.
I founded 1NE from the starting spot, since I didn't want Arabs to flip my capital. Eventually this didn't turn out as well as I would've thought, but the spot still superior. In the beginning I collected cash from the huts around Eurasia and took Sur when Phoenicia spawned, since I needed a port to the Mediterranean Sea. Persia spawned, brought their army under my axes and then signed a quick peace. Meanwhile Sur was preparing a fleet and after building the pantheon wonders Ashur poured out axes, catapults and swords.
This army then landed next Rome and took it. I signed peace and let the barbs finish the Romans. Eventually I took Athens, Mediolanum and Messana. I also founded Lagash 1W and 2S of the european oil. After that it was smooth sailing until the Seljuks spawned directly in Ashur and Sur!

I was one click away from retiring, but luckily I had enough troops around to take them both back on the next turn (Ashur had been building 11exp dumbos for a while). I WBd my palace and disappeared buildings back to both cities, since there is no way I could lost the cities, had the Seljuks spawned outside the cities like they should.
Another surprise was that the Ottomans flip Ashur.

Well I took Doriskos from them after the unit flipping had stopped and that was the end of it. After that I crabbed triple conquerors, which came in handy when HRE declared war on me. I had even give up Lagash for a while to get my troops back from Persia, which they had attached to my empire. After taking back Lagash and sieging Wien HRE capitulated. I had also vassalised Aztecs, Mali and Incas. Later Incas and HRE collapsed though. I also secured my NAn interests. and then began to build up an army to encounter the mega empires of Spain, England and Russia. I fought each of them in turn because of congresses, but in a brief moment of peace I managed to vassalise respawned China and Vikings. I was still far behind on population, when the 20th century was nearing its end, so I sparked a nuclear war agaist monster Russia with Korea, Mongolia, Portugal, Ethiopia and Spain as vassals. I fired around 30 nukes around the world and conquered Spain and parts of eastern Europe to fulfill the requirements. In the end I also founded two cities in Canada and culture bombed them to get enough land.
The World in 200, 1000, 1500 and 1802
And in 1930, 1960, 1990, 2000 and 2008:
My empire:
My army, carriers are where the action is. Air forces are concentrated around Russia. Power graphs shows the nuclear apocalypse and other losses that the Netherlands, Spain and Russia suffered.
I was known as the nice guy:
BTW, who should I try next?