I've never understood this assumption, shared by both more-educated conservatives and genuine leftists alike (only American-type liberals, ironically, picture capitalism as something
enduring and which consequentially must be ameliorated).
Capitalism as the
dominant mode of production in America has not even, well, dominated for fully two centuries. Whither the assumption that it's going anywhere anytime soon? The farthest back one can possibly date the
final eclipse of the feudal order in America is 1865; I go back and forth whether one ought to take 1865 or 1896 as the 'start-date' for a fully-developed capitalist order completely independent of the social framework of feudalism/mercantilism.
If we look at the previous modes of production, we see each lasted in turn many
thousands of years. It's impossible to say "this is when x replaced y" in sociological terms, but, ignoring the proto-feudalist
latifundia in the late Roman Empire, we may very well date Feudalism Proper as having existed
in some form or fashion from the deposition of Romulus Augustulus in 476 to the abolition of serfdom in Eastern Europe in the late nineteenth - and, occasionally, even the early twentieth(!) - century.
I share the basically Marxist view that capitalism will some day pass from the historical playing field. But I think it's
far more likely we've only really just begun the capitalist era. Capitalism still has a vast amount of work to do: Christianity, that relic of Feudal Europe, has not disappeared. Man has not become completely atomized. "Tradition" still matters to the conservators of capitalism; it will cease to matter when the moorings of feudalism have been completely obliterated.
It may be that the vastly increased rapidity of technological and social change under the thrall of Das Kapital may speed up the process, but I strongly doubt we're in anything but Early Modern Capitalism as of yet. And those seeds which replace it will sprout naturally: we will see forms and functions of its replacement centuries before it is actually replaced, just as modern capitalism had precursors in, for instance, the Florentine Republic.
Hence my belief that the next epoch will be a
Megaunraveling in Generational terms. Capitalism is just getting started; feudalism still exists within relatively recent memory; the old bonds must be fully broken - Christianity buried under, familial collectivism disintegrated, Westphalian nation-states replaced by transnational corporations and institutions completely - before anything new can occur.