Social disharmony under capitalism, no, never, geez, world wars have always been common, starvation in a world with plenty of food, etc etc.
Lovely world we live in.
Who knows what comes next but capitalism, like any socio-economic system, will not be the last.
You equate anarcho-synicalism with socialism? Wow, ignorant or stupid.
You like the 1800s capitalism, a mercantalist are you? Or maybe you just liked the way European countries got rich exploiting their colonies. Personally I find colonialism and exploitation abhorrent. Still, each to their own, I suppose the Europeans did have private property rights over the colonies, let's just ignore how they got that private property.
DS