World Poverty Rate Halved since 1990.

[Taem]

Of course, all else isn't equal, and a thousand different factors will keep wages in some places higher than others.

Of course. And it won't be for a very long time. I was pointing out that if you follow the train of thought far enough in regards to worldwide economic poverty level improvement, you'll see the trend, that since smartphones and our connected world, the poverty gap is shrinking - as pointed out by Kath - and if it keeps happening at it's current pace, it's inevitable we will reach a level of equality sooner or later.

What does this have to do with currency?

My understanding of commerce is that a countries monetary value is based mostly on it's net worth in terms of what it exports, rather that be goods or services. In the above hypothesis (this is more of a world such as FIT's utopia, however with Capitalism), everyone is on equal standing so all monetary values are equal thus negating the need for multiple currencies, hence a one-world currency. I don't even know if this would ever happen, but it seemed logical to me when I wrote it.