I think restricting this to "the west" begs the question. We conventionally define "the west" to be the relatively stable, relatively democratic countries of t

I think restricting this to "the west" begs the question. We conventionally define "the west" to be the relatively stable, relatively democratic countries of the US and Western Europe. We exclude various countries simply because they haven't been stable. But even in "the west", you don't need to go back very far to find revolutions driven (in part) by economic issues. Hitler couldn't have seized power without Germany's rough experiences in the great depression.