The city-states of ancient greece and the rome republic had citizens voting in .

The city-states of ancient Greece and the Rome republic had citizens voting in direct democracies.

Direct democracy or pure democracy is a form of democracy in which people decide on policy initiatives directly. For instance,  Athens is often called the birthplace of democracy. There, the citizens had a direct democracy, or a government in which all citizens vote on rules and laws.

porter is writing economic history because he is focusing on the cost of developing vaccines.

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.