often thought about that exact question.............having spent many years there the reason (i think) is because of the seasons/weather..............
in Europe there are seasons where there is nothing to eat wise ...so the northern hemisphere had to learn to lookforward into the future and prepare for the time of cold and little food.....the ability of looking into the long term future is something we take for granted
the African has a very poor ability to look further than a few days and they have an almost no existent spacial abilty
thats how it seems to me
what do you