Extreme poverty may be ending

I am a little skeptical, but this article seems air-tight.  If so then this is clearly fantastic news.  We still have much work to do to bring the poorest of the poor up further.  But here's the headline that is hard to ignore:

"Barring a catastrophe, there will never be more than a billion people in poverty in the future history of the world."

Wow.  I wish we better understood the causes.  I only assume that this will get studied in more detail.