They notice how the economy changes over time and during this period this was mainly due to the industrial revolution that was happening. But the economy was evolving to become profit-driven and create a vast global market, which Marx and Engels believed led to new tyrannies. Since the economy has become more industrialized, work has become similar due to new advanced technologies. The work of workers became less extensive and less necessary, leaving proletarians having difficulty finding and maintaining employment. Goods became much easier to produce, but as production became easier to achieve, proletariats benefited even less from their own labor. The economy was created by the labor of the proletariat, but the profits from this labor only accrued to the wealth of the bourgeoisie in the form of private investment..