When one thinks colonial power, one tends to think of Britain, France, Beligian and other European powers. Turkey is almost never mentioned though it too was one. Arabs not only colonized countries they also converted their people to their faiths and customs (nothing wrong with that). N. Sudan today is arabized. Russia of course was a colonial power too. One has to see which colonies did better than others. On the whole I would say that the British colonies did better after independance than lets say French/ Belgian colonies. Belgium had one of the worst administrations of Rwanda, Burundi & Congo. But what can one expect from a small country which probably did not have the means to admin. efficiently the country.