It is often the racists who portray themselves as "dispassionate scientists", as if they have no agenda. And it is also the same people who know very little about the subject. To know anything, you have to by minimum have a passion for that knowledge. Anyone trying to hide that is putting up a facade.
No, it doesn't make sense to talk about Caucasian race. There isn't enough genetic difference between any human populations to divide humans into subspecies or races, unlike for example dogs. Humans have the least genetic variation of any mammalian species, so you can't make the dog comparison anyways.
Furthermore the name was created on fallacious premises to begin with. From the creator of the "Caucasian race" Johann Friedrich Blumenbach:
Caucasian variety - I have taken the name of this variety from Mount Caucasus, both because its neighborhood, and especially its southern slope, produces the most beautiful race of men, I mean the Georgian; and because all physiological reasons converge to this, that in that region, if anywhere, it seems we ought with the greatest probability to place the autochthones (birth place) of mankind.
The genetic diseases you mentioned are significant mutations leading into strong dysfunctionalities in how the brain is supposed to function. Leading it not to function correctly. This is far from evolutionary path leading one population of people into some sort of mental retardation, especially when evolutionary selection would be against it. In addition most of the mentioned diseases are recessive which is the only reason they have survived, as any offspring with the disease won't survive to pass the genes on.
Autism is a different case because it's not necessarily genetic (although I'm not sure if there are also genetic cases). In fact autism cases have exploded in recent history, so environmental factors are likely a contributor. One such theory is the vaccines containing mercury which is a strong neuro-toxin decaying neuron connections which would result into the observed behavior. I'm not going into that discussion however.
I'm being unspecific about intelligence because it's inherently a very ambiguous concept, which is one of the fallacies of the IQ testing and the arguments given by the racists like in this thread. I can see short comings and non-objectiveness in almost every IQ test I have seen. And that without even taking into account the fact that they're "adjusted" periodically to reflect the norm which obviously means they're not perfectly objective to begin with.
I was referring to 18th century Germany and for example theories created by Johann Friedrich Blumenbach.
Obviously intelligence has a genetic factor, there is no question about that. Why is cat's intellect different from humans? Due to its DNA. But that is not the point, when it comes to humans, there is no significant enough variation that could lead into large scale intellectual differences. Likewise due to the genetic mixing you couldn't label one traditionally understood "race" as one or the other. Furthermore it makes little sense from evolutionary perspective.
The child genius comment is not laughable. A genius is always tied to a particular skill given in a cultural context. For example playing a piano, or juggling. It is possible that a child is born with certain innate physical qualities that help him in whatever he practices. Like being fair, or strong, tall, etc... But to assume that any 5 year old learned to play piano as some kind of a genetic gift is far more ludicrous. It takes hard practice to perfect your body and mind to work in unison for any particular task, approximately the same for everyone bar perhaps the effects of personal motivation and rigor of the exercise.
With the exception of people with disorders that in some way may make them amazingly good at certain tasks, like having eidetic memory.
It's often the dumb ones who take the stance on discussing other people's intelligence. There is a wealth of circumstances and complexity of the issue that never crosses this posters mind, yet he is quick to make definitive claims of such gravity. Racism has the interesting tendency of exposing the fools even amongst the most educated individuals.
Oh, where would I start... The structure of the brain? Our understanding and concept of what is "intelligence"? Nonexistentent genetical variation between the so called "races", which are themselves based on fallacious premises? The theory of races after all started in Germany as measured by the differences in the shapes of skulls, and was mainly categorized as an issue of beauty. With Germans obviously appointing themselves (aryans) the most graceful and beautiful "race" of them all. And now people are trying to retrofit genetic explanations on such an old theory based purely on pseudo-science? There is at maximum 5-15% genetic variation between the continental populations, and note that this is not the same as our naive notions of "race". There is less genetic variation in humans than in any other mammalian species. Worldwide genetic variation in humans is less significant than in 2 closely related chimpanzee species having evolved closely together in western Africa, to give you some magnitude for comparison. 90% of the genetic variation occurs on a local level as opposed to globally, if you can wrap your head around what that means? And every instance of "child genius" that has been studied has boiled down to no innate ability, but rigorous practice from an early age. Meaning that "intelligence" is largely learned, mind is an empty plate of neurons waiting to be connected. The only thing conceivably affecting their training are chemical balances, malnutrition, toxicity of the environment, and so on...
Basing your theories directly on empirical evidence about the economies of the world obviously can't factor in all the relevant facts. You say that all the African countries with no whites are poor? Did you know that a lot of them have been paying the debts created by the colonialists ever since they were "liberated"? Do you know how the West still sponsors guerillas and pays diamond merchants in many parts of Africa? Only a secluded mind could have such delusions of grandeur. I recommend debating with some intellectual and educated black scholars.
Africa had some of the world's first high culture societies which are probably older than Europe's or China's due to the tremendous history of that continent. I mean it is the cradle of the civilization after all. But you wouldn't think that way today with a lot of that history having been nearly eradicated and not taught.
If you consider the historical genetic variation in humans through our expansion from Africa and then spreading throughout the continents. Differences in the development of intelligence due to the different environmental factors makes little sense. Likewise the overall genetic of variation in humans is extraordinarily small and interbreeding extraordinarily high compared to other mammalian species further reducing any likelihood of significant variation between the continental populations.