Level: SL and HL
Why do some countries stay poor? This topic examines the poverty cycle and the economic, political and social barriers that hold back growth and development, and considers which barriers matter most.

Low incomes → households spend almost all income on necessities, so savings are low → low savings mean little funding for investment in physical capital (machinery, infrastructure), human capital (education, health) and natural capital → low investment keeps productivity low → low productivity means low incomes → the cycle repeats.
The cycle can occur at the level of households, communities and whole countries. Breaking it requires an injection from outside the cycle, such as government spending, foreign aid, FDI, remittances or microcredit.