They are more likely to share similar economic background. In short – while families to vary quite a bit, you are much more similar to your family than you are to any random stranger off the street – in the US. In Europe, since the migrant waves have yet to hit US and Brazilian proportions (now being seen accelerating in Australia, Canada, and New Zealand), while people differ extraordinarily – esp from country to country, nevertheless we remain much more similar genetically, which informs lifestyle, economic background, etc.
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