As the industrial revolution took place the machines started to do the main work and the source of transport and manufacturing became easier. Hence the machines depended on fossil fuels and the world economy shifted from agrarian to mechanization.
As the more developed nations progresses more quickly the same so of revolution impacted the developing nations slowly.
This can be proved from the shift from the old system to modern service sectors economy and thus lead to the growth of the GDP and the markets.
hoped this helped :)