This is demonstrably false and utter nonsense. It simply regurgitates the same Leftist pablum they've been dishing out for over a century.
Population growth is a good thing and a sign of hope in the future. The general supply of labor cannot outstrip general demand for labor in a free market, so the blame here is government intervention. Elites always exist. Good societies have elites by merit while bad ones have political elites. The living standards of the "poor" rise along with all living standards in a free society. It cannot be helped, so again growing disparity points to politics and thus this is a governmental problem.
Finally, we should be very skeptical of this theory since the desperate to believe something atheists love it: Maybe 2020 will see a global revolution against corrupt uber-elites whose corporations stand in the way of a sustainable future and global justice.
Check out this line from the article:
Just as an epidemic can be averted by an effective vaccine, violence can be prevented if society is prepared to learn from history — if the US government creates more jobs for graduates, say, or acts decisively to reduce inequality.
Bwahahaha! The GOVERNMENT cannot mandate more jobs. If so, then Obama would be a hero with no unemployment by now. Reduces inequality? Defined as and by who? Oh, how noble, comrade! Raise your fist in a power salute!