1,Marxism in political economy Cont'd The forces that would eventually cause capitalism to self-destruct were all integral parts of the capitalist system. ·A,Competition ·B,Monopoly C,The tendency for profit rates to fall.1, Marxism in political economy Cont’d The forces that would eventually cause capitalism to self-destruct were all integral parts of the capitalist system. • A, Competition • B, Monopoly • C, The tendency for profit rates to fall