What do a government based on a parliamentary system and a government based on a democratic system have in common?

How did tyrants attempt to gain the approval of common citizens in ancient greece?

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

How did margaret thatcher de-escalate the cold war