Thinking beyond boundaries

What if the world was just one country?

That's the thought experiment in this piece here from 'The Conversation' website, which is an excellent source of information and challenge.

It includes a quote from astronaut 'Rusty' Schweickart who was part of Apollo 9's crew.

You look down there and you can’t imagine how many borders and boundaries you cross, again and again and again, and you don’t even see them.