paraphrase 'After the Industrial Revolution, the rising capitalist system brought about great depression and two World Wars. Especially, the economic disarray and lack of stability within countries that occurred after the wars caused regional inequalities and differences in living standards between socio-economic groups, and pushed people to seek living and working opportunities in other regions. The lack of employment opportunities, scarcity, hunger, and the increase in diseases and early deaths formed the push factors for migration in underdeveloped countries, while better living conditions, employment opportunities, and higher wages created attractive conditions for migration.'