Do you have evidence that other people have developed more quickly. History should be compulsory. The last I checked the Western world took more than 500 yrs to develop to what they're now. Africa,Latin Americans, Indians and name any poor people in the world will get there with time. Africa in my view and in the view of others is making tremendous progress. That will escape you because you need to understand the historical context and base the Africa started from.
I'm afraid that is all rather sloppy thinking. It is the essence of a lame argument that I heard a couple of decades ago and which I didn't think people still trotted out.
First, without getting into any definition of "development", it assume that development occurs at the same linear rate. In the way you think, one of the implications would be that Africans will always be "500 years" behind the West; after all, they started "500 years" behind, and the West is not exactly sitting idle. Try to read history as more than just "this happened when" and "that person did this and that when"; try to get a deeper understanding.
Today your African will go to school and university and come to grasp with law, medicine, technology, systems of governance, etc. that took the West hundreds of years to develop; it is not necessary that the African himself go through the same process and same hundreds of years. The argument that "the West took so long, so therefore!" would make sense only if Africa was totally isolated from the rest of the world and "starting from scratch".
A second point is that I don't know exactly what sort of history you have been reading. I would urge you to look well beyond the sort of stuff that they dish out in your typical primary school curriculum. In particular, if you wish to argue that, somehow, Africa has long been behind Europe and needs "500 years" or whatever, then I would urge you to take a better look at broader history what sorts of systems Africans had and when they had them.
Let us consider some concrete cases of things that I would like to see in what I would consider "human development". I will take Kenya as my example:
(a)
Food: "
At the national level, 35 percent of children under five years are stunted, 16 percent are underweight, and 7 percent are wasted. While the levels of wasting and stunting have remained almost constant in the last 20 years: between 6 percent and 7 percent for wasting and 30 percent and 35 percent for stunting, there has been a slight decline in underweight from 22 percent in 1993 to 16 percent in 2008."
http://globalnutritionreport.org/2014/07/18/the-nutrition-paradox-in-kenya/Those are grim figures. And they are in addition to what happens with the perpetual cycle of famine and begging for food.
Now, Kenya has land and there is nothing magical about irrigation, large-scale agriculture, and so on. Nothing that cannot be learned from those who have done it right. So, what is it that required hundreds of years?
(b)
Health: That many Kenyans do not have a place to shit is tremendously costly to the country---easily preventable diseases, deaths among the young. The financial costs in one year actually greatly exceeds what it would take to provide the right facilities. (And the provision of clean drinking water is another similar issue.)
Dealing with the problem is not something that requires hundreds of years of development. It can be done right now if the will is there.
(c)
Corruption: I cannot add to how Bella has already described it. Again, there is nothing magical that would be required to deal with it. We know how other countries have dealt with it, and there is no reason why we cannot learn from them and aply the lessons if we wish to.
I want to urge people like you to give up this idea that the African is some backward and helpless unfortunate victim whose best hope is to wait for evolution to do its thing. As you go around your daily life, enjoying the products, in whatever form, of hundreds of years of Western "development": (a) reflect on the fact that you don't have to go through much of that "development" because the products have been handed to you; (b) you should then reflect on how best to use all that to improve the African lot.