President of the year or good governance it's the same thing. You don't win an Oscar because you suck at acting

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I am not saying only african presidents are horrible nasty people who cause their people to starve i am saying it seems in africa that is the case in just about every country. To me it seems in africa you do not find a good african president where as on other continents you will find decent well run countries.
The answer you are looking for is that the continent of Africa is a great cradle. It doesn't get too hot or cold, there's no extreme weather like hurricanes or typhoons, there is no natural _need_ to build permanent structures because there isn't much that you need to protect yourself from.
In Europe, the case is different. The weather sucks. You have to stay indoors more. You need to exercise forward-thinking to make it through the winter, or you'll either freeze or starve. That is why people in Europe "progressed" quicker than in other areas.
However, right up until 1945, Europe was ravaged by war after war after war. Do you know how many times France and England invaded each other? Do you remember what the Scandinavian vikings did? Are you up to date on your history of Cold War-era Eastern Europe and the atrocities committed there? Europe may have 'progressed' further than other places, but the people there were just like people everywhere: selfish, greedy, and willing to do anything to get what they want - including genocide. Do you remember Bosnia?
Seriously, look up your history, son. You'll find that all these terrible things that you believe are endemic to Africans are actually a feature of human beings all over the world. Some do it better, some do it worse, but we all do it. If you can accept that, then you can start to comprehend how hurtful the legacy of colonialism and systemised racial hatred have been.
Humans aren't genetically pre-disposed to be nice to each other - especially not when resources are scarce (or being funnelled off to richer countries). The colonies divided up bits of Africa without regard for the people living there: people who now live in the same country but speak completely different languages and have completely different cultures and beliefs. Take away their food and its inevitable that they would fight. It's happened all over the world. Africa is no different.
The answer to why Africa is still so far behind can be either: external forces making a bad situation worse, or Africans just can't get along with each other. Your inference that Africans as a whole are just a brutal bunch of thugs while people in the rest of the world are higher evolved and better at resolving their differences just doesn't stand up to any sort of scrutiny.
Those Africans throwing stones at each other are no more or less violent than the people in the first world throwing missiles at each other. The only difference is the amount of technology available to them.
People are a-seholes. Everywhere and in every country, you will find a-seholes. From the top to the bottom of society, they are there. Give them right environment and half a chance, and they will show you just how arseholian people can be.
But the point to remember at the end of the day is that they are still just people. And if you were in the same situation, you would end up behaving in exactly the same way.