Whatever it is that will propel humans to the stars, you'll find it in Slavic people, Jewish people, Asians, English, Men, Women, etc. Perhaps in different proportions, but with a large enough population there will be a tail of X who have the same amount of {trait} as Y.
Example for the second approach that can be brought to bear: Arab militaries don't do basic maintenance on equipment because they don't have enough consideration for strangers / expectations of reciprocity. No number of Arabs added together will overcome this. 2/2