Democracy started in the Ancient Greek period. In three countries, this is the main way pople decide their laws. They are England, Norway and Chile.
I think that democracy is fair because everyone (over the age of 18) has the right too choose an option they would like.
For example, brexit. Everyone can choose if they want to leave or stay but not always get what they vote for. Not everyone will be happy with the outcome because there will always be someone whose vote doesn't win. However, this is still fair because everyone was heard and their vote counted.