Those who breed canines, cattle and horses know there are methods to increase intelligence, size, as well as other desirable traits of the offspring by practicing selective (scientific) breeding - AKA Eugenics. Go to the horse racing industry, cattle auctions, or the dog show circuit, and you will find eugenicists abound. They know which breeds to use, and which not to use. Given that human genetics are almost identical to other mammals, especially great apes, where the similarity is greater than 98 percent, why in the last 60 years have academics and political leaders decided the laws of nature do not apply to humans? Moreover, is it any coincidence that the demise of Eugenic studies and policies coincided with the rise of cultural Marxism (after WWII) in America's universities and its halls of government? If Eugenics do not matter, as most politicians and ivory tower academics would have you believe, why are the countries that historically employed Eugenic policies (Germany, Canada, Australia, etc.) so much better off than countries where Eugenic policies were never in place (Mexico, Brazil, the Caribbean, etc.)? Could it be that centuries of smart, scientific breeding, as opposed to the wanton race-mixing festivals of the lower latitudes, gave certain European and North Asian peoples genetic advantages that aided in the spreading of their respective civilizations?