At different stages of economic evolution, depending on differences in political, national-cultural, living and other conditions, different forms of struggle come to the fore and become the principal forms of struggle;
(different forms of struggle; come; to the fore; T:At different stages of economic evolution) (different forms of struggle; become; the principal forms of struggle; T:At different stages of economic evolution)
different forms of struggle different forms of struggle
come become
to the fore T:At different stages of economic evolution
the principal forms of struggle T:At different stages of economic evolution