In it's present form. Three big factors.
Globalization - the evening out of the worlds wealth, wages.
Global warming - disruptions in food supply, living areas.
Overpopulation - more people with more money competing for finite resources. Oil now, everything later.
Maybe a fourth. US war on Muslim nations for their resources. Will create political divisions, China/Russia as a new superpower at a time when US economic power is diminishing.
Big changes.
Arf
