Well, consider the alternative scenario.
A feudal society is one of extreme scarcity; getting rid of all the lords, knights, priests, etc. and dividing up their wealth would still leave people in extreme poverty...spending their whole lives in mostly trying to scratch a living from the soil. Things like literacy might completely disappear...no one would have the time or the energy to read, much less write (by longhand) a book.
So capitalism is a necessity.
When socialists take power in a backward country (Russia, China), the consequence isn't socialism -- it's state monopoly capitalism and does all the same things that ordinary capitalism did in Europe and North America.
Eventually, it transforms itself into ordinary capitalism...as we have seen.
Some have argued that in the modern era, the native capitalists in backward countries are incapable of industrialization -- they are "in the pockets" of the imperialists.
That may well be true in some backward countries.
