Many times is read that Ancient Greece and present democracy are different concepts.
I suppose democracy in the present can be defined as a government in which the average of citizen ideas are taken into account; so, the government acts according to major will. Also people elect their government.
In Ancient Greece, for example in Cleisthenes government, I suppose democracy didn't represent the whole society but only aristocracy, although it was direct democracy. I don't know how this two things were connected (democracy but inside an aristocracy).
Would you give some fundamental differences between actual and Ancient Greece democracies?
If the question is too broad, just some videos or short essay would be fine.