When you say unmatched that implies that nowhere else in the world can give opportunities in those fields that are equal, and that is plain wrong, in fact the USA is slipping from being the top in those. When you say population that's more welcoming to migrants, as someone from Africa, my own and those I know, our perception of the USA has changed so much that many people I know would not even consider moving there due to your current attitudes towards Muslim, Latin American and African migrants. When you say outdoors with cleaner air and water, I hear of your fracking, of Flint, of mass open cast mines across your country, of your president leaving the Paris climate agreement. When you say cheap prices, I've been all over the Third World and the USA is not cheap at all. When you say optimistic, friendly and humble, most of what I know of the USA's international actions is warmongering arrogance, of your far-right movements, of mass shootings and crazy abortion laws. I have many lovely American friends but they are not representative of the country that pushes a gun-friendly, war positive, women controlling message. That's why I wouldn't move to the US as it currently stands.