Answer:
Step-by-step explanation:
they have different ways of leadership...
ex- dictatorship
communism
(full government by a person/group of people)
socialism
countries may not believe in people having their own opinions.. and may support oppression of people.... may also believe that democracy can increase chances of overthrown government and rebellion... there are lots of reasons.
not every country has a democracy because the system isn't as great as we think, and oppressive leaders are tough to overthrow.