Tell a person that it's a big beautiful world, full of fresh opportunities and a sense of freedom that is just not available by staying put and you will inevitably be treated to a litany of reasons why expanding your life into more than one country just isn't practical.

Let's consider some of those commonly stated reasons, and why they might be unjustified. While largely directed at Americans, these are also applicable to pretty much anyone from any country.

"America is the best country in the world. I'd be a fool to leave."

That was absolutely true, not so very long ago. America certainly was the best – and it was unique. But it no longer exists, except as an ideal. The geography it occupied has been co-opted by the United States, which today is just another nation-state. And, most unfortunately, one that's become especially predatory toward its citizens.

"My parents and grandparents were born here; I have roots in this country."

An understandable emotion; everyone has an atavistic affinity for his place of birth, including your most distant relatives born long, long ago, and far, far away. I suppose if Lucy, apparently the first more-or-less human we know of, had been able to speak, she might have pled roots if you'd asked her to leave her valley in East Africa. If you buy this argument, then it's clear your forefathers, who came from Europe, Asia, or Africa, were made of sterner stuff than you are.